Patent Publication Number: US-2015085455-A1

Title: Electronic component-embedded substrate and manufacturing method thereof

Description:
CROSS REFERENCE TO RELATED APPLICATION 
     This application claims the benefit of and priority under 35 U.S.C. §119 to Korean Patent Application No. KR 10-2013-0114436, entitled “ELECTRONIC COMPONENT-EMBEDDED SUBSTRATE AND MANUFACTURING METHOD THEREOF,” filed on Sep. 26, 2013, which is hereby incorporated by reference in its entirety into this application. 
     BACKGROUND 
     1. Field of the Invention 
     Embodiments of he invention relate to an electronic component-embedded substrate and a manufacturing method thereof. More particularly, embodiments of the invention relates to an electronic component-embedded substrate having an improved cavity structure in which two or more embedding spaces having electronic components inserted thereinto, respectively, and a connecting space connecting the embedding spaces to each other are provided in one cavity, and a manufacturing method thereof. 
     2. Description of the Related Art 
     In accordance with the development of an electronic industry, a demand for multi-functionalization and miniaturization of electronic components has gradually increased. As a result, a circuit board has become slim and light. In accordance with multi-functionalization and densification of an electronic device, a size of a substrate has decreased, while the number of embedded components has increased. As an effort to provide more functions in a limited area of the substrate, the development of an electronic component-embedded substrate has been actively conducted. 
     A scheme of embedding electronic components according to the related art will be described. Cavities in which electronic components are to be mounted are formed in a core substrate, and the electronic components are embedded in the cavities. A build-up layer is formed so as to cover the cavities, and vias are formed in the build-up layer and are electrically connected to electrodes or pads of the electronic component to form the electronic component-embedded substrate. 
     In order to improve a degree of freedom in a design by minimizing an area of the cavities occupied by the embedded components at the time of manufacturing the electronic component-embedded substrate, a scheme of embedding a plurality of electronic components in one large cavity has been suggested instead of a scheme of forming independent cavities with respect to the respective embedded components. 
     In this scheme, the electronic component-embedded substrate is manufactured by embedding the plurality of electronic components in one cavity and then stacking an insulating material, for example, a resin. However, the resin flows in a margin space in the cavity at the time of being stacked, such that the embedded components inserted into the cavity are also shifted by the resin. 
     The shift of the embedded components may cause a short-circuit between the plurality of embedded components inserted into one cavity and/or may cause, for example, an eccentricity defect of the via. 
     SUMMARY 
     Accordingly, embodiments of the invention have been made to provide a technology for improving a cavity structure so as to limit a shift range of a plurality of electronic components in the case in which the plurality of electronic components are inserted into one cavity. 
     According to at least one embodiment, there is provided an electronic component-embedded substrate including a cavity formed in a core substrate and including two or more embedding spaces which have a rectangular shape (when viewed on a plane) and are connected to each other by a connecting space, and two or more electronic components separately accommodated in the embedding spaces of the cavity, respectively. According to at least one embodiment, neighboring long sides of first and second embedding spaces connected to each other by the connecting space are partially connected to each other by the connecting space, and one side (when viewed on the plane) forming a connecting width of the connecting space connecting the first and second embedding spaces to each other coincides with one short side of the first embedding space, and the other side (when viewed on the plane) coincides with the other short side of the second embedding space. 
     According to at least one embodiment, the connecting width w of the connecting space satisfies the following Equation: 
     
       
         
           
             
               a 
                
               
                   
               
                
               sin 
                
               
                   
               
                
               
                 θ 
                 i 
               
             
             &lt; 
             w 
             ≤ 
             
               
                 ab 
                 
                   a 
                   + 
                   Δ 
                 
               
               . 
             
           
         
       
     
     A According to at least one embodiment, a is a length of a short side (when viewed on the plane) of the electronic component, b is a length of a long side (when viewed on the plane) of the electronic component, Δ is a difference between a length of a short side of the embedding space and a length of the short side of the electronic component, and θ i  is a maximum rotatable angle in an independent cavity that does not have the connecting space and has a length of a short side (when viewed on the plane) corresponding to a+Δ. 
     According to at least one embodiment, Δ satisfies the following Equation: 0&lt;Δ&lt;b−a, and a height h of the connecting space (when viewed on the plane), which is a distance between the long side of the first embedding space and the long side of the second embedding space neighboring to the first embedding space, satisfies the following Equation: h≦a+Δ. 
     According to at least one embodiment, the height h of the connecting space (when viewed on the plane) satisfies the following Equation: b sin θ max +a cos θ max −(a+Δ)&lt;h, where θ max  is a maximum rotatable angle of the electronic component accommodated in the embedding space. 
     According to at least one embodiment, a maximum rotatable angle θ max  of the electronic component accommodated in the embedding space in a condition of the following Equation 1: 
     
       
         
           
             0 
             &lt; 
             Δ 
             ≤ 
             
               
                 
                   
                     
                       b 
                       2 
                     
                     + 
                     
                       b 
                        
                       
                         
                           
                             b 
                             2 
                           
                           - 
                           
                             4 
                              
                             
                               a 
                               2 
                             
                           
                         
                       
                     
                   
                   2 
                 
               
               - 
               a 
             
           
         
       
     
     and b&gt;2a satisfies the following Equation: 
     
       
         
           
             
               
                 
                   sin 
                   
                     - 
                     1 
                   
                 
                  
                 
                   
                     a 
                     + 
                     Δ 
                   
                   
                     
                       
                         a 
                         2 
                       
                       + 
                       
                         b 
                         2 
                       
                     
                   
                 
               
               - 
               
                 
                   cos 
                   
                     - 
                     1 
                   
                 
                  
                 
                   b 
                   
                     
                       
                         a 
                         2 
                       
                       + 
                       
                         b 
                         2 
                       
                     
                   
                 
               
             
             &lt; 
             
               θ 
               max 
             
             ≤ 
             
               
                 sin 
                 
                   - 
                   1 
                 
               
                
               
                 
                   
                     a 
                     + 
                     Δ 
                   
                   b 
                 
                 . 
               
             
           
         
       
     
     According to at least one embodiment, a maximum rotatable angle θ max  of the electronic component in a condition in which b&gt;2a and Equation 1 is not satisfied or b≦2a satisfies the following Equation: 
     
       
         
           
             
               
                 
                   sin 
                   
                     - 
                     1 
                   
                 
                  
                 
                   
                     a 
                     + 
                     Δ 
                   
                   
                     
                       
                         a 
                         2 
                       
                       + 
                       
                         b 
                         2 
                       
                     
                   
                 
               
               - 
               
                 
                   cos 
                   
                     - 
                     1 
                   
                 
                  
                 
                   b 
                   
                     
                       
                         a 
                         2 
                       
                       + 
                       
                         b 
                         2 
                       
                     
                   
                 
               
             
             &lt; 
             
               θ 
               
                 ma 
                  
                 
                     
                 
                  
                 x 
               
             
             ≤ 
             
               
                 cos 
                 
                   - 
                   1 
                 
               
                
               
                 
                   a 
                   
                     a 
                     + 
                     Δ 
                   
                 
                 . 
               
             
           
         
       
     
     Here, 
     
       
         
           
             
               sin 
               
                 - 
                 1 
               
             
              
             
               
                 a 
                 + 
                 Δ 
               
               b 
             
              
             
                 
             
              
             and 
              
             
                 
             
              
             
               cos 
               
                 - 
                 1 
               
             
              
             
               a 
               
                 a 
                 + 
                 Δ 
               
             
           
         
       
     
     is a maximum rotatable angle θ max     —     wmax  of the electronic component in the case in which 
     
       
         
           
             
               
                 w 
                 
                   ma 
                    
                   
                       
                   
                    
                   x 
                 
               
               = 
               
                 ab 
                 
                   a 
                   + 
                   Δ 
                 
               
             
             , 
           
         
       
     
     w max  is a maximum connecting width of the connecting space for any Δ, and 
     
       
         
           
             
               
                 sin 
                 
                   - 
                   1 
                 
               
                
               
                 
                   a 
                   + 
                   Δ 
                 
                 
                   
                     
                       a 
                       2 
                     
                     + 
                     
                       b 
                       2 
                     
                   
                 
               
             
             - 
             
               
                 cos 
                 
                   - 
                   1 
                 
               
                
               
                 b 
                 
                   
                     
                       a 
                       2 
                     
                     + 
                     
                       b 
                       2 
                     
                   
                 
               
             
           
         
       
     
     is a maximum rotatable angle in the independent cavity that does not have the connecting space and has the length of the short side (when viewed on the plane) corresponding to a+Δ. 
     According to at least one embodiment, the height h of the connecting space (when viewed on the plane) satisfies the following Equation: w tan θ max ≦h≦a+Δ in a condition in which the maximum rotatable angle θ max  of the electronic component accommodated in the embedding space satisfies the following Equation: 
     
       
         
           
             
               
                 θ 
                 
                   ma 
                    
                   
                       
                   
                    
                   x 
                 
               
               ≤ 
               
                 π 
                 4 
               
             
             , 
           
         
       
     
     and the height h of the connecting space (when viewed on the plane) satisfies the following Equation: 
     
       
         
           
             
               w 
               
                 tan 
                  
                 
                     
                 
                  
                 
                   θ 
                   
                     
                       ma 
                        
                       
                           
                       
                        
                       x 
                     
                      
                     
                         
                     
                   
                 
               
             
             ≤ 
             h 
             ≤ 
             
               a 
               + 
               Δ 
             
           
         
       
     
     in a condition in which the maximum rotatable angle θ max  of the electronic component satisfies the following Equation: 
     
       
         
           
             
               θ 
               
                 m 
                  
                 
                     
                 
                  
                 ax 
               
             
             ≥ 
             
               
                 π 
                 4 
               
               . 
             
           
         
       
     
     According to at least one embodiment, the height h of the connecting space (when viewed on the plane) satisfies the following Equation: 
     
       
         
           
             
               h 
               ≤ 
               
                 2 
                  
                 
                   
                     ( 
                     
                       
                         b 
                          
                         
                             
                         
                          
                         sin 
                          
                         
                             
                         
                          
                         
                           θ 
                           
                             m 
                              
                             
                                 
                             
                              
                             ax 
                           
                         
                       
                       + 
                       
                         a 
                          
                         
                             
                         
                          
                         cos 
                          
                         
                             
                         
                          
                         
                           θ 
                           
                             ma 
                              
                             
                                 
                             
                              
                             x 
                           
                         
                       
                       - 
                       
                         ( 
                         
                           a 
                           + 
                           Δ 
                         
                         ) 
                       
                     
                     ) 
                   
                   . 
                   
                     
 
                   
                    
                   
                     b 
                     2 
                   
                 
               
               ≤ 
               w 
             
             , 
             
               
                 and 
                  
                 
                     
                 
                  
                 Δ 
               
               ≤ 
               
                 
                   ( 
                   
                     
                       2 
                     
                     - 
                     1 
                   
                   ) 
                 
                  
                 
                   a 
                   . 
                 
               
             
           
         
       
     
     According to at least one embodiment, one end portion of at least one side forming the connecting width of the connecting space is connected to a short side of any one of first and second embedding spaces so as to coincide therewith, and the other end portion thereof is bent and meet a long side of the other embedding space, w, which is a long width of the connecting space formed by a distal end of the other end portion, is larger than a short width of the connecting space formed by a bent point of the other end portion, and a maximum rotation angle is formed at a distal end of the other end portion at the time of maximum rotation of the electronic component accommodated in the embedding space. 
     According to at least one other embodiment, there is provided an electronic component-embedded substrate including a core substrate, a cavity formed in the core substrate and including a first embedding space, which is one of two or more embedding spaces and is formed in a horizontal rectangular shape (when viewed on a plane), a connecting space, which is connected to a portion of a lower long side of the first embedding space, of which one side (when viewed on the plane) forming a connecting width coincides with one short side of the first embedding space and the other side (when viewed on the plane) meets the lower long side of the first embedding space, and a second embedding space, which is formed in a horizontal rectangular shape (when viewed on the plane) and has the other short side coinciding with the other side (when viewed on the plane) of the connecting space and an upper long side meeting the one side (when viewed on the plane) of the connecting space, two or more electronic components maximally rotatable at a point at which a side of the connecting space and a long side of the embedding space meet each other and separately accommodated in the embedding spaces of the cavity, respectively, so as not to contact each other at the time of being maximally rotated, and upper and lower insulating layers covering the electronic components embedded in the cavity and having a plurality of vias formed therein so as to be electrically connected to the electronic components while penetrating through at least one thereof. 
     According to at least one embodiment, the connecting width w of the connecting space satisfies the following Equation: 
     
       
         
           
             
               a 
                
               
                   
               
                
               sin 
                
               
                   
               
                
               
                 θ 
                 i 
               
             
             &lt; 
             w 
             ≤ 
             
               
                 ab 
                 
                   a 
                   + 
                   Δ 
                 
               
               . 
             
           
         
       
     
     According to at least one embodiment, a is a length of a short side (when viewed on the plane) of the electronic component, b is a length of a long side (when viewed on the plane) of the electronic component, Δ is a difference between a length of a short side of the embedding space and a length of the short side of the electronic component, and θ i  is a maximum rotatable angle in an independent cavity that does not have the connecting space and has a length of a short side (when viewed on the plane) corresponding to a+Δ. 
     According to at least one embodiment, Δ satisfies the following Equation: 0&lt;Δ&lt;b−a, and a height h of the connecting space (when viewed on the plane), which is a distance between the long side of the first embedding space and the long side of the second embedding space, satisfies the following Equation: h≦a+Δ. 
     According to at least one embodiment, the height h of the connecting space (when viewed on the plane) satisfies the following Equation: b sin θ max +a cos θ max −(a+Δ)&lt;h, where θ max  is a maximum rotatable angle of the electronic component accommodated in the embedding space. 
     
       
         
           
             
               b 
               2 
             
             ≤ 
             
               w 
                
               
                   
               
                
               and 
                
               
                   
               
                
               Δ 
             
             ≤ 
             
               
                 ( 
                 
                   
                     2 
                   
                   - 
                   1 
                 
                 ) 
               
                
               
                 a 
                 . 
               
             
           
         
       
     
     According to still at least one other embodiment, there is provided a manufacturing method of an electronic component-embedded substrate, including forming a cavity, in a core substrate, configured that two or more embedding spaces having a rectangular shape (when viewed on a plane) are connected to each other by a connecting space, so that neighboring long sides of first and second embedding spaces are partially connected to each other by the connecting space and one side (when viewed on the plane) forming a connecting width of the connecting space connecting the first and second embedding spaces coincides with one short side of the first embedding space, and the other side (when viewed on the plane) coincides with the other short side of the second embedding space, separately inserting two or more electronic components into the embedding spaces of the cavity, respectively, and covering the cavity into which the electronic components are inserted with an insulating layer(s) and forming a plurality of vias electrically connected to the electronic components while penetrating through the insulating layer. 
     According to at least one embodiment, in the forming of the cavity, the cavity is formed, so that the connecting width w of the connecting space satisfies the following Equation: 
     
       
         
           
             
               a 
                
               
                   
               
                
               sin 
                
               
                   
               
                
               
                 θ 
                 i 
               
             
             &lt; 
             w 
             ≤ 
             
               
                 ab 
                 
                   a 
                   + 
                   Δ 
                 
               
               . 
             
           
         
       
     
     According to at least one embodiment, a is a length of a short side (when viewed on the plane) of the electronic component, b is a length of a long side (when viewed on the plane) of the electronic component, Δ is a difference between a length of a short side of the embedding space and a length of the short side of the electronic component, and θ i  is a maximum rotatable angle in an independent cavity that does not have the connecting space and has a length of a short side (when viewed on the plane) corresponding to a+Δ. 
     According to at least one embodiment, in the forming of the cavity, the cavity is formed, so that Δ satisfies the following Equation: 0&lt;Δ&lt;b−a, and a height h of the connecting space (when viewed on the plane), which is a distance between the long side of the first embedding space and the long side of the second embedding space, satisfies the following Equation: h≦a+Δ. 
     According to at least one embodiment, in the forming of the cavity, the cavity is formed, so that a maximum rotatable angle θ max  of the electronic component accommodated in the embedding space in a condition of the following Equation 1: 
     
       
         
           
             0 
             &lt; 
             Δ 
             &lt; 
             
               
                 
                   
                     
                       b 
                       2 
                     
                     + 
                     
                       b 
                        
                       
                         
                           
                             b 
                             2 
                           
                           - 
                           
                             4 
                              
                             
                               a 
                               2 
                             
                           
                         
                       
                     
                   
                   2 
                 
               
               - 
               a 
             
           
         
       
     
     and b&gt;2a satisfies the following Equation: 
     
       
         
           
             
               
                 
                   sin 
                   
                     - 
                     1 
                   
                 
                  
                 
                   
                     a 
                     + 
                     Δ 
                   
                   
                     
                       
                         a 
                         2 
                       
                       + 
                       
                         b 
                         2 
                       
                     
                   
                 
               
               - 
               
                 
                   cos 
                   
                     - 
                     1 
                   
                 
                  
                 
                   b 
                   
                     
                       
                         a 
                         2 
                       
                       + 
                       
                         b 
                         2 
                       
                     
                   
                 
               
             
             &lt; 
             
               θ 
               
                 m 
                  
                 
                     
                 
                  
                 ax 
               
             
             ≤ 
             
               
                 sin 
                 
                   - 
                   1 
                 
               
                
               
                 
                   
                     a 
                     + 
                     Δ 
                   
                   b 
                 
                 . 
               
             
           
         
       
     
     According to at least one embodiment, in the forming of the cavity, the cavity is formed, so that a maximum rotatable angle θ max  of the electronic component in a condition in which Equation 1 is not satisfied or b≦2a satisfies the following Equation: 
     
       
         
           
             
               
                 
                   sin 
                   
                     - 
                     1 
                   
                 
                  
                 
                   
                     a 
                     + 
                     Δ 
                   
                   
                     
                       
                         a 
                         2 
                       
                       + 
                       
                         b 
                         2 
                       
                     
                   
                 
               
               - 
               
                 
                   cos 
                   
                     - 
                     1 
                   
                 
                  
                 
                   b 
                   
                     
                       
                         a 
                         2 
                       
                       + 
                       
                         b 
                         2 
                       
                     
                   
                 
               
             
             &lt; 
             
               θ 
               
                 m 
                  
                 
                     
                 
                  
                 ax 
               
             
             ≤ 
             
               
                 cos 
                 
                   - 
                   1 
                 
               
                
               
                 
                   a 
                   
                     a 
                     + 
                     Δ 
                   
                 
                 . 
               
             
           
         
       
     
     Here, 
     
       
         
           
             
               sin 
               
                 - 
                 1 
               
             
              
             
               
                 a 
                 + 
                 Δ 
               
               b 
             
              
             
                 
             
              
             and 
              
             
                 
             
              
             
               cos 
               
                 - 
                 1 
               
             
              
             
               a 
               
                 a 
                 + 
                 Δ 
               
             
           
         
       
     
     is a maximum rotatable angle θ max     —     wmax  of the electronic component in the case in which 
     
       
         
           
             
               
                 w 
                 max 
               
               = 
               
                 ab 
                 
                   a 
                   + 
                   Δ 
                 
               
             
             , 
           
         
       
     
     w max  is a maximum connecting width of the connecting space for any Δ, and 
     
       
         
           
             
               
                 sin 
                 
                   - 
                   1 
                 
               
                
               
                 
                   a 
                   + 
                   Δ 
                 
                 
                   
                     
                       a 
                       2 
                     
                     + 
                     
                       b 
                       2 
                     
                   
                 
               
             
             - 
             
               
                 cos 
                 
                   - 
                   1 
                 
               
                
               
                 b 
                 
                   
                     
                       a 
                       2 
                     
                     + 
                     
                       b 
                       2 
                     
                   
                 
               
             
           
         
       
     
     is a maximum rotatable angle in the independent cavity that does not have the connecting space and has the length of the short side (when viewed on the plane) corresponding to a+Δ. 
     According to at least one embodiment, in the forming of the cavity, the cavity is formed, so that the height h of the connecting space (when viewed on the plane) satisfies the following Equation: b sin θ max +a cos θ max −(a+Δ)&lt;h. 
     According to at least one embodiment, in the forming of the cavity, the cavity is formed, so that 
     
       
         
           
             
               b 
               2 
             
             ≤ 
             
               w 
                
               
                   
               
                
               and 
                
               
                   
               
                
               Δ 
             
             ≤ 
             
               
                 ( 
                 
                   
                     2 
                   
                   - 
                   1 
                 
                 ) 
               
                
               
                 a 
                 . 
               
             
           
         
       
     
     Various objects, advantages and features of the invention will become apparent from the following description of embodiments with reference to the accompanying drawings. 
    
    
     
       BRIEF DESCRIPTION OF DRAWINGS 
       These and other features, aspects, and advantages of the invention are better understood with regard to the following Detailed Description, appended Claims, and accompanying Figures. It is to be noted, however, that the Figures illustrate only various embodiments of the invention and are therefore not to be considered limiting of the invention&#39;s scope as it may include other effective embodiments as well. 
         FIG. 1  is a plan view schematically showing an electronic component-embedded substrate according to an embodiment of the invention. 
         FIGS. 2A to 2C  are plan views schematically showing an electronic component-embedded substrate according to another embodiment of the invention. 
         FIGS. 3A to 3D  are plan views schematically showing an electronic component-embedded substrate according to another embodiment of the invention. 
         FIG. 4  is a plan view partially showing an electronic component-embedded substrate according to another embodiment of the invention. 
         FIG. 5  is a cross-sectional view schematically showing an electronic component-embedded substrate according to another embodiment of the invention. 
         FIG. 6  is a flow chart schematically showing a manufacturing method of an electronic component-embedded substrate according to another embodiment of the invention. 
     
    
    
     DETAILED DESCRIPTION 
     Advantages and features of the invention and methods of accomplishing the same will be apparent by referring to embodiments described below in detail in connection with the accompanying drawings. However, the invention is not limited to the embodiments disclosed below and may be implemented in various different forms. The embodiments are provided only for completing the disclosure of the invention and for fully representing the scope of the invention to those skilled in the art. 
     For simplicity and clarity of illustration, the drawing figures illustrate the general manner of construction, and descriptions and details of well-known features and techniques may be omitted to avoid unnecessarily obscuring the discussion of the described embodiments of the invention. Additionally, elements in the drawing figures are not necessarily drawn to scale. According to at least one embodiment, the dimensions of some of the elements in the figures may be exaggerated relative to other elements to help improve understanding of embodiments of the invention. Like reference numerals refer to like elements throughout the specification. 
     Hereinafter, various embodiments of the invention will be described in detail with reference to the accompanying drawings. 
     Electronic Component-Embedded Substrate 
     First, an electronic component-embedded substrate according to an embodiment of the invention will be described in detail with reference to the accompanying drawings. In the specification, the same reference numerals will be used in order to describe the same components throughout the accompanying drawings. 
       FIG. 1  is a plan view schematically showing an electronic component-embedded substrate according to an embodiment of the invention;  FIGS. 2A to 2C  are plan views schematically showing an electronic component-embedded substrate according to another embodiment of the invention;  FIGS. 3A to 3D  are plan views schematically showing an electronic component-embedded substrate according to another embodiment of the invention;  FIG. 4  is a plan view partially showing an electronic component-embedded substrate according to another embodiment of the invention; and  FIG. 5  is a cross-sectional view schematically showing an electronic component-embedded substrate according to yet still according to another embodiment of the invention. 
     Referring to  FIGS. 1 to 5 , an electronic component-embedded substrate according to another embodiment of the invention is configured to include a cavity  10  and two or more electronic components  30  and  30 ′. The respective components will be described in detail with reference to  FIGS. 1 to 5 . 
     First, referring to  FIGS. 1 to 5 , the cavity  10  of the electronic component-embedded substrate is formed in a core substrate  100 . According to at least one embodiment, the cavity  10  includes two or more embedding spaces  10   a  and  10   b  having a rectangular shape when viewed on a plane |[A1] and connected to each other by a connecting space  11 . According to at least one embodiment, first and second embedding spaces  10   a  and  10   b  are connected to each other by the connecting space  11 . According to at least one embodiment, neighboring long sides of the first and second embedding spaces  10   a  and  10   b  connected to each other by the connecting space  11  are partially connected to each other. According to at least one embodiment, the first and second embedding spaces  10   a  and  10   b  are only partially connected to each other. 
     According to at least one embodiment, one side  11   R  (when viewed on the plane) forming a connecting width of the connecting space  11  connecting the first and second embedding spaces  10   a  and  10   b  to each other coincides with one short side  10   as  of the first embedding space  10   a , and the other side  11   L  (when viewed on the plane) coincides with the other short side of the second embedding space  10   b . Thus, one side  11   R  of the connecting width of the connecting space  11  coincides with one short side  10   as  of the first embedding space  10   a  and meets a long side of the second embedding space  10   b . In addition, the other side  11 L of the connecting width of the connecting space  11  coincides with the other short side of the second embedding space  10   b  and meets a long side  10   al  of the first embedding space  10   a.    
     According to at least one embodiment, the cavity includes the two or more embedding spaces  10   a  and  10   b  and the connecting space  11  connecting the embedding spaces  10   a  and  10   b  to each other, thereby making it possible to minimize a short-circuit due to a contact between the electronic components  30  inserted in the embedding spaces  10   a  and  10   b , respectively. Therefore, according to at least one embodiment, the short-circuit is structurally prevented. Thus, in at least one embodiment, even though a shift occurs in the electronic components  30  inserted into the embedding spaces  10   a  and  10   b  at the time of stacking an insulating layer, for example, the short-circuit between the embedded electronic components  30  is prevented. In addition, in the present exemplary embodiment, the shift of the electronic components  30  is minimized by a structure of the embedding spaces  10   a  and  10   b  and the connecting space  11 . Therefore, an eccentricity defect of a via  120   a  is prevented. 
     Further, according to at least one embodiment, a margin volume is decreased in the case in which an insulating material is filled in the margin of the cavity  10  into which the electronic components  30  are inserted according to stacking of the insulating layer  110  than in the case in which two or more electronic components  30  are embedded in the cavity  10  having a rectangular shape according to the conventional art and/or the electronic components  30  are embedded in independent cavities, respectively, according to the conventional art. Therefore, a stacking void occurring due to insufficient of the insulating material filled in the margin volume, for example, is improved. Further, according to at least one embodiment, the insulating material is sufficiently filled in the margin volume, thereby making it possible to accomplish an improvement effect for a delamination problem between the electronic component  30  and the insulating material. 
     According to at least one embodiment, the two or more electronic components  30  of the electronic component-embedded substrate are separately accommodated in the embedding spaces  10   a  and  10   b  of the cavity  10 , respectively, and do not directly contact each other. 
     According to at least one embodiment, according to at least one embodiment, a connecting width w of the connecting space  11  satisfies the following Equation: 
     
       
         
           
             
               a 
                
               
                   
               
                
               sin 
                
               
                   
               
                
               
                 θ 
                 i 
               
             
             &lt; 
             w 
             ≤ 
             
               
                 ab 
                 
                   a 
                   + 
                   Δ 
                 
               
               . 
             
           
         
       
     
     According to at least one embodiment, a is a length of a short side (when viewed on the plane) of the electronic component  30 , and b is a length of a long side (when viewed on the plane) of the electronic component  30 . Thus, the electronic components  30  satisfying the following Equation: a&lt;b are embedded in the embedding spaces  10   a  and  10   b , respectively. Here, Δ is a difference between a length of a short side of the embedding space  10   a  or  10   b  and a length of a short side of the electronic component  30 . Thus, in the case in which the length b of the long side of the electronic component  30  and the length a of the short side of the electronic component  30  are determined, a range of the connecting width w of the connecting space  11  is determined by a margin of the short side of the embedding space  10   a  or  10   b  rather than a margin of the long side thereof. 
     According to at least one embodiment, the connecting space  11  is added, such that the connecting width of the connecting space  11  exceeds a predetermined range in order to increase a rotatable angle of the electronic component  30 . Thus, the connecting width should be larger than a length between points T i  and P h , which are an opposite side to a rotatable maximum angle &lt;Q i  in a triangle formed by a rotatable maximum angle in an independent cavity that does not have the connecting space  11 , for example, a triangle formed of points Q i , T i , P h  in  FIG. 1 . Therefore, referring to the electronic component  30  shown as the dotted line rectangle including vertexes S i , Q i , and T i  of  FIG. 1 , the connecting width w of the connecting space  11  satisfies the following Equation: a sin θ i &lt;w. According to at least one embodiment, θ i  is a maximum rotatable angle in an independent cavity that does not have the connecting space  11  and has a length of a short side (when viewed on the plane) corresponding to a+Δ. 
     Referring to  FIGS. 1 and 3A  to  3 D, the electronic component  30  is maximally rotated at a point P at which a lower long side  10   al  of the embedding space  10   a  and the other side  11   L  forming the connecting width of the connecting space  11  meet each other. According to at least one embodiment, a maximum rotation range is changed depending on a change in a difference Δ between a margin of the short side of the embedding space  10   a , thus, the length of the short side of the embedding space  10   a  and a length of the short side of the electronic component  30 . According to at least one embodiment, a distance between the point P, which is a rotation origin point, and a point P h  on one short side of the embedding space  10   a  that a horizontal extension line of the point P meets is the connecting width w of the connecting space  11 . In addition, here, a maximum value of the connecting width w of the connecting space  11  is changed depending on Δ. Thus, the larger Δ, the larger the maximum rotatable angle at the point P and the larger the maximum value of the connecting width w of the connecting space  11 . According to at least one embodiment, the maximum value of the connecting width w of the connecting space  11  means a connecting width w at which the electronic component  30  inserted into the embedding space  10   a  or  10   b  is rotated at a maximum rotation angle at the point P without getting out to the connecting space  11 . Thus, in the maximum value of the connecting width w of the connecting space  11 , a maximum rising vertex S of two upper vertexes of the electronic component  30  coincides with a point P v  at which the extension line passing through the point P, which is the rotation origin point, and an upper long side of the embedding space  10   a  meet each other or an upper falling vertex Q or Q″ (See  FIG. 3C  or  3 D), which is the other of the two upper vertexes of the electronic component  30  coincides with a point P h . According to at least one embodiment, in the case in which the maximum rising vertex S of the electronic component  30  exceeds the point P v  and then becomes close to one short side  10   as  of the embedding space  10   a  or the upper falling vertex of the electronic component  30  exceeds the point P h  and then becomes distant downwardly from the point P h , the electronic component  30  gets out to the connecting space  11 . Therefore, for any Δ, the connecting width w of the connecting space  11  is determined in a range in which the upper falling vertex of the electronic component  30  does not fall in excess of the point P h  and the maximum rising vertex of the electronic component  30  does not approach one short side  10   as  of the embedding space  10   a  in excess of the point P v  along an upper long side of the embedding space  10   a  when the electronic component  30  in the embedding space  10   a  is maximally rotated around the rotation origin point P. 
     According to at least one embodiment, a maximum connecting width of the connecting space  11  for any Δ is 
     
       
         
           
             
               ab 
               
                 a 
                 + 
                 Δ 
               
             
             . 
           
         
       
     
     According to at least one embodiment, in  FIGS. 3A to 3D , in the case in which the maximum rising vertex S of the electronic component  30  coincides with the point P v , a maximum connecting width w max  of the connecting space  11  for any Δ or Δ 1  is calculated as follows. A connecting width w of the connecting space  11  shown in  FIGS. 3A to 3D  is the maximum connecting width w max . According to at least one embodiment, in  FIGS. 3A and 3B , the upper falling vertex Q of the electronic component  30  does not arrive at the point P h , unlike  FIGS. 3C and 3D . 
     Since 
     
       
         
           
             
               cos 
                
               
                   
               
                
               
                 θ 
                 
                   max_w 
                    
                   
                       
                   
                    
                   max 
                 
               
             
             = 
             
               
                 a 
                 
                   a 
                   + 
                   Δ 
                 
               
               = 
               
                 
                   
                     w 
                     max 
                   
                   b 
                 
                  
                 
                     
                 
                  
                 or 
               
             
           
         
       
       
         
           
             
               
                 cos 
                  
                 
                     
                 
                  
                 
                   θ 
                   
                     max_w 
                      
                     
                         
                     
                      
                     max 
                   
                 
               
               = 
               
                 
                   
                     a 
                     1 
                   
                   
                     
                       a 
                       1 
                     
                     + 
                     
                       Δ 
                       1 
                     
                   
                 
                 = 
                 
                   
                     w 
                     max 
                   
                   
                     b 
                     1 
                   
                 
               
             
             , 
             
               
                 w 
                 max 
               
               = 
               
                 
                   ab 
                   
                     a 
                     + 
                     Δ 
                   
                 
                  
                 
                     
                 
                  
                 or 
               
             
           
         
       
       
         
           
             
               w 
               max 
             
             = 
             
               
                 
                   
                     a 
                     1 
                   
                    
                   
                     b 
                     1 
                   
                 
                 
                   
                     a 
                     1 
                   
                   + 
                   
                     Δ 
                     1 
                   
                 
               
               . 
             
           
         
       
     
     Meanwhile, in  FIG. 3C , a connecting width w′ of the connecting space  11  is any connecting width smaller than the maximum connecting width w max . In this case, a maximum rising vertex S′ of the electronic component  30  does not arrive at the point P v  and the upper falling vertex Q′ of the electronic component  30  does not arrive at the point P h . 
     According to at least one embodiment, in  FIGS. 3C  and/or  3 D, in the case in which the upper falling vertex Q or Q2 of the electronic component  30  coincides with the point P h , a maximum connecting width w max  of the connecting space  11  for any Δ or Δ 2  is calculated as follows. Connecting widths w and w″ of the connecting space  11  shown in  FIGS. 3C and 3D  are the maximum connecting width w max . According to at least one embodiment, in  FIG. 3D , a maximum rising vertex S″ of the electronic component  30  does not arrive the point P v , unlike  FIG. 3C . 
     Since 
     
       
         
           
             
               sin 
                
               
                   
               
                
               
                 θ 
                 
                   max_w 
                    
                   
                       
                   
                    
                   max 
                 
               
             
             = 
             
               
                 a 
                 
                   w 
                   max 
                 
               
               = 
               
                 
                   
                     a 
                     + 
                     Δ 
                   
                   b 
                 
                  
                 
                     
                 
                  
                 or 
               
             
           
         
       
       
         
           
             
               
                 sin 
                  
                 
                     
                 
                  
                 
                   θ 
                   
                     max_w 
                      
                     
                         
                     
                      
                     max 
                   
                 
               
               = 
               
                 
                   
                     a 
                     2 
                   
                   
                     w 
                     max 
                   
                 
                 = 
                 
                   
                     
                       a 
                       2 
                     
                     + 
                     
                       Δ 
                       2 
                     
                   
                   
                     b 
                     2 
                   
                 
               
             
             , 
             
               
                 w 
                 max 
               
               = 
               
                 
                   ab 
                   
                     a 
                     + 
                     Δ 
                   
                 
                  
                 
                     
                 
                  
                 or 
               
             
           
         
       
       
         
           
             
               w 
               max 
             
             = 
             
               
                 
                   
                     a 
                     2 
                   
                    
                   
                     b 
                     2 
                   
                 
                 
                   
                     a 
                     2 
                   
                   + 
                   
                     Δ 
                     2 
                   
                 
               
               . 
             
           
         
       
     
     According to at least one embodiment, θ max     —     wmax  is a maximum rotatable angle of the electronic component  30  at the maximum connecting width w max  of the connecting space  11  for any Δ. For reference, θ max  of  FIG. 1  is a maximum rotatable angle of the electronic component  30  at the rotation origin point P at the connecting width w of the connecting space  11  for any Δ, and θ′ max  of  FIG. 3  is a maximum rotatable angle of the electronic component  30  at the rotation origin point P at a connecting width w′ of any connecting space  11  for any Δ. In addition, in  FIG. 3D , a 1  and a 2  are a length of a short side of the electronic component  30 , and b 1  and b 2  are a length of a long side of the electronic component  30 . Here, a 1 =a 2 , and b 1 ≠b 2 . Thus,  FIG. 3D  shows a connecting width of the connecting space  11  in the case in which a length of the long side of the electronic component  30  is changed. 
     Therefore, since the maximum connecting width of the connecting space  11  for any Δ is 
     
       
         
           
             
               ab 
               
                 a 
                 + 
                 Δ 
               
             
             , 
           
         
       
     
     the connecting width w of the connecting space  11  for any Δ is 
     
       
         
           
             w 
             ≤ 
             
               
                 ab 
                 
                   a 
                   + 
                   Δ 
                 
               
               . 
             
           
         
       
     
     According to at least one embodiment, Δ satisfies the following Equation: 0&lt;Δ&lt;b−a. Here, a height h of the connecting space  11  (when viewed on the plane), which is a distance between a long side  10   al  of the first embedding space  10   a  and a long side of the second embedding space  10   b  neighboring to the first embedding space  10   a , satisfies the following Equation: h≦a+Δ. Since the electronic components  30  is inserted into the embedding spaces  10   a  and  10   b , a should be larger than 0. In addition, when Δ is equal to or larger than b−a, the long sides of the electronic components  30  is inserted into the short sides of the embedding spaces  10   a  and  10   b . Therefore, Δ is smaller than b−a. Here, an entire size of the cavity  10  is set so that the height h of the connecting space  11  (when viewed on the plane) satisfies the following Equation: h≦a+Δ. 
     According to at least one embodiment, referring to  FIGS. 3A to 3D , the height h of the connecting space  11  (when viewed on the plane) satisfies the following Equation: b sin θ max +a cos θ max −(a+Δ)&lt;h. θ max  is a maximum rotatable angle of the electronic component  30  accommodated in the embedding space  10   a  or  10   b . According to at least one embodiment, referring to  FIGS. 3A to 3C , b sin θ max     —     wmax +a cos θ max     —     wmax =a+Δ+h a , referring to  FIG. 3D , b 1  sin θ max     —     wmax +a 1  cos θ max     —     wmax =a 1 +Δ 1 +h a  or b 2  sin θ max     —     wmax +a 2  cos θ″ max     —     wmax =a 2 +Δ 2 +h″ a , and referring to  FIG. 3C , b sin θ′ max +a cos θ′ max =a+Δ+h′ a . Thus, since h a =b sin θ max     —     wmax +a cos θ max     —     wmax −(a+Δ), h a =b 1  sin θ max     —     wmax +a 1  cos θ max     —     wmax −(a 1 +Δ 1 ), h′ a =b sin θ max +a cos θ′ max −(a+Δ), or h″ a =b 2  sin θ max     —     wmax +a 2  cos θ″ max     —     wmax −(a 2 +Δ 2 ), the height h of the connecting space  11  (when viewed on the plane) satisfies the following Equation: h&gt;b sin θ max +a cos θ max −(a+Δ). According to at least one embodiment, θ max     —     wmax  is a maximum rotatable angle of the electronic component  30  at the maximum connecting width w max  of the connecting space  11  for any Δ, and θ′ max  of  FIG. 3C  is a maximum rotatable angle of the electronic component  30  at an allowable connecting width w′ of the connecting space  11  for any Δ. In addition, h a  is a height at which the electronic component  30  protrudes downwardly of the lower long side  10   al  of the embedding space  10   a  when the electronic component  30  is maximally rotated at the maximum connecting width w max , of the connecting space  11  for any Δ or Δ 1 , h″ a  is a height at which the electronic component  30  protrudes downwardly of the lower long side  10   al  of the embedding space  10   a  when the electronic component  30  is maximally rotated at the maximum connecting width w max  of the connecting space  11  for any Δ 2 , and h′ a  is a height at which the electronic component  30  protrudes downwardly of the lower long side  10   al  of the embedding space  10   a  when the electronic component  30  is maximally rotated at the allowable connecting width w′ of the connecting space  11  for any Δ. Thus, each of h a , h′ a , and h″ a  is a height from the lower long side  10   al  of the embedding space  10   a  to the maximum falling vertex of the electronic component  30  when the electronic component  30  inserted into the embedding space  10   a  is maximally rotated. 
     According to at least one embodiment, generally referring to  FIGS. 1 and 3D , the maximum rotatable angle θ max  of the electronic component  30  accommodated in the embedding space  10   a  in a condition of the following Equation 1: 
     
       
         
           
             0 
             &lt; 
             Δ 
             ≤ 
             
               
                 
                   
                     
                       b 
                       2 
                     
                     + 
                     
                       b 
                        
                       
                         
                           
                             b 
                             2 
                           
                           - 
                           
                             4 
                              
                             
                                 
                             
                              
                             
                               a 
                               2 
                             
                           
                         
                       
                     
                   
                   2 
                 
               
               - 
               a 
             
           
         
       
     
     and b&gt;2a satisfies the following Equation: 
     
       
         
           
             
               
                 
                   sin 
                   
                     - 
                     1 
                   
                 
                  
                 
                   
                     a 
                     + 
                     Δ 
                   
                   
                     
                       
                         a 
                         2 
                       
                       + 
                       
                         b 
                         2 
                       
                     
                   
                 
               
               - 
               
                 
                   cos 
                   
                     - 
                     1 
                   
                 
                  
                 
                   b 
                   
                     
                       
                         a 
                         2 
                       
                       + 
                       
                         b 
                         2 
                       
                     
                   
                 
               
             
             &lt; 
             
               θ 
               max 
             
             ≤ 
             
               
                 sin 
                 
                   - 
                   1 
                 
               
                
               
                 
                   
                     a 
                     + 
                     Δ 
                   
                   b 
                 
                 . 
               
             
           
         
       
     
     Referring to  FIG. 1 , when the electronic component is maximally rotated in the independent cavity that does not have the connecting space  11  and has the length of the short side (when viewed on the plane) corresponding to a+Δ, b sin θ i +a cos θ i =a+Δ. According to at least one embodiment, when it is assumed that 
     
       
         
           
             
               
                 b 
                 
                   
                     
                       a 
                       2 
                     
                     + 
                     
                       b 
                       2 
                     
                   
                 
               
               = 
               
                 
                   cos 
                    
                   
                       
                   
                    
                   α 
                    
                   
                       
                   
                    
                   and 
                    
                   
                       
                   
                    
                   
                     a 
                     
                       
                         
                           a 
                           2 
                         
                         + 
                         
                           b 
                           2 
                         
                       
                     
                   
                 
                 = 
                 
                   sin 
                    
                   
                       
                   
                    
                   α 
                 
               
             
             , 
             since 
           
         
       
       
         
           
             
               
                 
                   b 
                    
                   
                       
                   
                    
                   sin 
                    
                   
                       
                   
                    
                   
                     θ 
                     i 
                   
                 
                 + 
                 
                   acos 
                    
                   
                       
                   
                    
                   
                     θ 
                     i 
                   
                 
               
               = 
               
                 
                   
                     
                       a 
                       2 
                     
                     + 
                     
                       b 
                       2 
                     
                   
                 
                  
                 
                   ( 
                   
                     
                       sin 
                        
                       
                           
                       
                        
                       
                         θ 
                         i 
                       
                        
                       cos 
                        
                       
                           
                       
                        
                       α 
                     
                     + 
                     
                       cos 
                        
                       
                           
                       
                        
                       
                         θ 
                         i 
                       
                        
                       sin 
                        
                       
                           
                       
                        
                       α 
                     
                   
                   ) 
                 
               
             
             , 
             
               
 
             
              
             
               
                 
                   
                     
                       a 
                       2 
                     
                     + 
                     
                       b 
                       2 
                     
                   
                 
                  
                 
                   sin 
                    
                   
                     ( 
                     
                       
                         θ 
                         i 
                       
                       + 
                       
                         
                           cos 
                           
                             - 
                             1 
                           
                         
                          
                         
                           b 
                           
                             
                               
                                 a 
                                 2 
                               
                               + 
                               
                                 b 
                                 2 
                               
                             
                           
                         
                       
                     
                     ) 
                   
                 
               
               = 
               
                 a 
                 + 
                 
                   Δ 
                    
                   
                       
                   
                    
                   and 
                 
               
             
           
         
       
       
         
           
             
               θ 
               i 
             
             = 
             
               
                 
                   sin 
                   
                     - 
                     1 
                   
                 
                  
                 
                   
                     a 
                     + 
                     Δ 
                   
                   
                     
                       
                         a 
                         2 
                       
                       + 
                       
                         b 
                         2 
                       
                     
                   
                 
               
               - 
               
                 
                   cos 
                   
                     - 
                     1 
                   
                 
                  
                 
                   
                     b 
                     
                       
                         
                           a 
                           2 
                         
                         + 
                         
                           b 
                           2 
                         
                       
                     
                   
                   . 
                 
               
             
           
         
       
     
     Therefore, in an exemplary embodiment of the present invention having the connecting space  11 , the maximum rotatable angle θ max  of the electronic component  30  accommodated in the embedding space  10   a  satisfies the following Equation: 
     
       
         
           
             
               
                 
                   sin 
                   
                     - 
                     1 
                   
                 
                  
                 
                   
                     a 
                     + 
                     Δ 
                   
                   
                     
                       
                         a 
                         2 
                       
                       + 
                       
                         b 
                         2 
                       
                     
                   
                 
               
               - 
               
                 
                   cos 
                   
                     - 
                     1 
                   
                 
                  
                 
                   b 
                   
                     
                       
                         a 
                         2 
                       
                       + 
                       
                         b 
                         2 
                       
                     
                   
                 
               
             
             &lt; 
             
               
                 θ 
                 max 
               
               . 
             
           
         
       
     
     According to at least one embodiment, a portion shown as a dotted line in  FIG. 3D , which corresponds to the electronic component  30  having a short side a 2  and a long side b 2  and satisfying the following Equation: b 2 &gt;2a 2 , shows the case in which the upper falling vertex Q″ of the electronic component  30  coincides with the point P h  or P″ h  before the maximum rising vertex S″ of the electronic component  30  coincides with the point P v  at the maximum connecting width w″ of the connecting space  11  depending on an increase in Δ 2 . Referring to  FIG. 3D , in the case in which the upper falling vertex Q″ of the electronic component  30  satisfying the following Equation: b 2 &gt;2a 2  coincides with the point P h  before the maximum rising vertex of the electronic component  30  coincides with the point P, at the maximum connecting width w″ of the connecting space  11  depending on the increase in Δ 2  or the upper falling vertex and the maximum rising vertex simultaneously coincide with the point P h  and the point P v , respectively, 
     
       
         
           
             
               sin 
                
               
                   
               
                
               
                 θ 
                 
                   max_w 
                    
                   
                       
                   
                    
                   max 
                 
                 ″ 
               
             
             = 
             
               
                 
                   a 
                   2 
                 
                 
                   w 
                   ″ 
                 
               
               = 
               
                 
                   
                     
                       a 
                       2 
                     
                     + 
                     
                       Δ 
                       2 
                     
                   
                   
                     b 
                     2 
                   
                 
                  
                 
                     
                 
                  
                 and 
               
             
           
         
       
       
         
           
             
               
                 tan 
                  
                 
                     
                 
                  
                 
                   θ 
                   
                     max_w 
                      
                     
                         
                     
                      
                     max 
                   
                   ″ 
                 
               
               ≤ 
               
                 
                   
                     
                       a 
                       2 
                     
                     + 
                     
                       Δ 
                       2 
                     
                   
                   
                     w 
                     ″ 
                   
                 
                  
                 
                     
                 
                  
                 Here 
               
             
             , 
             since 
           
         
       
       
         
           
             
               
                 
                   tan 
                    
                   
                       
                   
                    
                   
                     θ 
                     
                       max_w 
                        
                       
                           
                       
                        
                       max 
                     
                     ″ 
                   
                 
                 ≤ 
                 
                   
                     
                       
                         a 
                         2 
                       
                       + 
                       
                         Δ 
                         2 
                       
                     
                     
                       
                         
                           b 
                           2 
                           2 
                         
                         - 
                         
                           
                             ( 
                             
                               
                                 a 
                                 2 
                               
                               + 
                               
                                 Δ 
                                 2 
                               
                             
                             ) 
                           
                           2 
                         
                       
                     
                   
                    
                   
                       
                   
                    
                   and 
                    
                   
                       
                   
                    
                   
                     w 
                     ″ 
                   
                 
               
               = 
               
                 
                   
                     a 
                     2 
                   
                    
                   
                     b 
                     2 
                   
                 
                 
                   
                     a 
                     2 
                   
                   + 
                   
                     Δ 
                     2 
                   
                 
               
             
             , 
             
               
 
             
              
             
               
                 
                   a 
                   2 
                 
                  
                 
                   b 
                   2 
                 
               
               ≤ 
               
                 
                   ( 
                   
                     
                       a 
                       2 
                     
                     + 
                     
                       Δ 
                       2 
                     
                   
                   ) 
                 
                  
                 
                   
                     
                       
                         b 
                         2 
                         2 
                       
                       - 
                       
                         
                           ( 
                           
                             
                               a 
                               2 
                             
                             + 
                             
                               Δ 
                               2 
                             
                           
                           ) 
                         
                         2 
                       
                     
                   
                   . 
                   
                     
 
                   
                    
                   Thus 
                 
               
             
             , 
             
               
                 
                   ( 
                   
                     
                       a 
                       2 
                     
                      
                     
                       b 
                       2 
                     
                   
                   ) 
                 
                 2 
               
               ≤ 
               
                 
                   
                     ( 
                     
                       
                         a 
                         2 
                       
                       + 
                       
                         Δ 
                         2 
                       
                     
                     ) 
                   
                   2 
                 
                  
                 
                   
                     ( 
                     
                       
                         b 
                         2 
                         2 
                       
                       - 
                       
                         
                           ( 
                           
                             
                               a 
                               2 
                             
                             + 
                             
                               Δ 
                               2 
                             
                           
                           ) 
                         
                         2 
                       
                     
                     ) 
                   
                   . 
                 
               
             
           
         
       
     
     According to at least one embodiment, when it is assumed that (a 2 +Δ 2 ) 2 =t, since 
     
       
         
           
             
               
                 
                   t 
                   2 
                 
                 - 
                 
                   
                     b 
                     2 
                     2 
                   
                    
                   t 
                 
                 + 
                 
                   
                     ( 
                     
                       
                         a 
                         2 
                       
                        
                       
                         b 
                         2 
                       
                     
                     ) 
                   
                   2 
                 
               
               &lt; 
               
                 0 
                  
                 
                     
                 
                  
                 and 
                  
                 
                     
                 
                  
                 0 
               
               &lt; 
               t 
             
             , 
             
               
 
             
              
             
               0 
               &lt; 
               t 
               ≤ 
               
                 
                   
                     
                       b 
                       2 
                       2 
                     
                     + 
                     
                       
                         b 
                         2 
                       
                        
                       
                         
                           
                             b 
                             2 
                             2 
                           
                           - 
                           
                             4 
                              
                             
                                 
                             
                              
                             
                               a 
                               2 
                               2 
                             
                           
                         
                       
                     
                   
                   2 
                 
                 . 
               
             
           
         
       
     
     In addition, since 
     
       
         
           
             
               0 
               &lt; 
               
                 Δ 
                 2 
               
             
             , 
             
               
 
             
              
             
               0 
               &lt; 
               
                 Δ 
                 2 
               
               ≤ 
               
                 
                   
                     
                       
                         b 
                         2 
                         2 
                       
                       + 
                       
                         
                           b 
                           2 
                         
                          
                         
                           
                             
                               b 
                               2 
                               2 
                             
                             - 
                             
                               4 
                                
                               
                                 a 
                                 2 
                                 2 
                               
                             
                           
                         
                       
                     
                   
                   2 
                 
                 - 
                 
                   
                     a 
                     2 
                   
                   . 
                 
               
             
           
         
       
     
     Thus, in the case in which b&gt;2a, when the condition of Equation 1 is satisfied, the upper falling vertex Q″ of the electronic component  30  coincides with the point P h  (=P″ h ) and the connecting space  11  has the maximum connecting width w″. 
     In the case in which b&gt;2a and the condition of Equation 1 is satisfied, referring to  FIG. 3D , a maximum rotatable angle θ″ max     —     wmax  of the electronic component  30  accommodated in the embedding space  10   a  having the connecting space  11  of the maximum connecting width w″ satisfies the following Equation: 
     
       
         
           
             
               θ 
               max_wmax 
               ″ 
             
             = 
             
               
                 sin 
                 
                   - 
                   1 
                 
               
                
               
                 
                   
                     
                       a 
                       2 
                     
                     + 
                     
                       Δ 
                       2 
                     
                   
                   
                     b 
                     2 
                   
                 
                 . 
               
             
           
         
       
     
     Therefore, a maximum rotatable angle θ max  of the electronic component  30  accommodated in the embedding space  10   a  having an allowable connecting width for Δ satisfies the following Equation: 
     
       
         
           
             
               θ 
               max 
             
             ≤ 
             
               
                 sin 
                 
                   - 
                   1 
                 
               
                
               
                 
                   
                     a 
                     + 
                     Δ 
                   
                   b 
                 
                 . 
               
             
           
         
       
     
     Therefore, referring to  FIGS. 1 and 3D , in the case in which b&gt;2a and the condition of Equation 1 is satisfied, the maximum rotatable angle θ max  of the electronic component  30  accommodated in the embedding space  10   a  satisfies the following Equation: 
     
       
         
           
             
               
                 
                   sin 
                   
                     - 
                     1 
                   
                 
                  
                 
                   
                     a 
                     + 
                     Δ 
                   
                   
                     
                       
                         a 
                         2 
                       
                       + 
                       
                         b 
                         2 
                       
                     
                   
                 
               
               - 
               
                 
                   cos 
                   
                     - 
                     1 
                   
                 
                  
                 
                   b 
                   
                     
                       
                         a 
                         2 
                       
                       + 
                       
                         b 
                         2 
                       
                     
                   
                 
               
             
             &lt; 
             
               θ 
               max 
             
             ≤ 
             
               
                 sin 
                 
                   - 
                   1 
                 
               
                
               
                 
                   
                     a 
                     + 
                     Δ 
                   
                   b 
                 
                 . 
               
             
           
         
       
     
     According to at least one embodiment, 
     
       
         
           
             
               sin 
               
                 - 
                 1 
               
             
              
             
               
                 a 
                 + 
                 Δ 
               
               b 
             
           
         
       
     
     is a maximum rotatable angle θ max     —     wmax  of the electronic component  30  in the case in which 
     
       
         
           
             
               
                 w 
                 max 
               
               = 
               
                 ab 
                 
                   a 
                   + 
                   Δ 
                 
               
             
             , 
           
         
       
     
     and w max  is a maximum connecting width of the connecting space  11  for any Δ. 
     Next, the case in which b&gt;2a and the condition of Equation 1 is not satisfied will be described. According to at least one embodiment, in the case in which 
     
       
         
           
             Δ 
             &gt; 
             
               
                 
                   
                     
                       b 
                       2 
                     
                     + 
                     
                       b 
                        
                       
                         
                           
                             b 
                             2 
                           
                           - 
                           
                             4 
                              
                             
                               a 
                               2 
                             
                           
                         
                       
                     
                   
                   2 
                 
               
               - 
               a 
             
           
         
       
     
     or in the case in which 
     
       
         
           
             
               Δ 
               ≥ 
               
                 
                   
                     
                       
                         b 
                         2 
                       
                       + 
                       
                         b 
                          
                         
                           
                             
                               b 
                               2 
                             
                             - 
                             
                               4 
                                
                               
                                 a 
                                 2 
                               
                             
                           
                         
                       
                     
                     2 
                   
                 
                 - 
                 a 
               
             
             , 
           
         
       
     
     although not directly shown, the portion shown as the dotted line in  FIG. 3D  will have a structure similar to that of a dotted line showing the case of Δ in  FIG. 3B . Thus, describing it using reference numerals of  FIG. 3D , in the electronic component  30  satisfying the following Equation: b 2 &gt;2a 2 , the maximum rising vertex S″ of the electronic component  30  coincides with the point P v  before the upper falling vertex Q″ of the electronic component  30  coincides with the point P h  or P″ h  at the maximum connecting width w″ of the connecting space  11  depending on an increase in Δ 2  or the maximum rising vertex and the upper falling vertex simultaneously coincide with the point P v  and the point P h  or the point P″ h , respectively. Since this case has a structure similar to a condition of b␣2a as shown in  FIGS. 3A to 3C , thus, the maximum rising vertex of the electronic component  30  coincides with the point P v  before the upper falling vertex of the electronic component  30  coincides with the point P h , a maximum rotatable angle θ max  of the electronic component  30  in the condition of b≦2a will be described. 
     Referring to  FIGS. 3A to 3C , a maximum rotatable angle θ″ max     —     wmax  of the electronic component  30  accommodated in the embedding space  10   a  having the connecting space  11  of the maximum connecting width w max  in the condition of b≦2a satisfies the following Equation: 
     
       
         
           
             
               θ 
               max_wmax 
             
             = 
             
               
                 cos 
                 
                   - 
                   1 
                 
               
                
               
                 
                   a 
                   
                     a 
                     + 
                     Δ 
                   
                 
                 . 
               
             
           
         
       
     
     Therefore, a maximum rotatable angle θ max , of the electronic component  30  accommodated in the embedding space  10   a  having an allowable connecting width for Δ satisfies the following Equation: 
     
       
         
           
             
               θ 
               max 
             
             ≤ 
             
               
                 cos 
                 
                   - 
                   1 
                 
               
                
               
                 
                   a 
                   
                     a 
                     + 
                     Δ 
                   
                 
                 . 
               
             
           
         
       
     
     Therefore, referring to  FIGS. 1 and 3A  to  3 C, in the case in which b&gt;2a and the condition of Equation 1 is not satisfied, b&gt;2a and 
     
       
         
           
             
               Δ 
               ≥ 
               
                 
                   
                     
                       
                         b 
                         2 
                       
                       + 
                       
                         b 
                          
                         
                           
                             
                               b 
                               2 
                             
                             - 
                             
                               4 
                                
                               
                                 a 
                                 2 
                               
                             
                           
                         
                       
                     
                     2 
                   
                 
                 - 
                 a 
               
             
             , 
           
         
       
     
     or the condition of b≦2a is satisfied, the maximum rotatable angle θ max  of the electronic component  30  accommodated in the embedding space  10   a  satisfies the following Equation: 
     
       
         
           
             
               
                 
                   sin 
                   
                     - 
                     1 
                   
                 
                  
                 
                   
                     a 
                     + 
                     Δ 
                   
                   
                     
                       
                         a 
                         2 
                       
                       + 
                       
                         b 
                         2 
                       
                     
                   
                 
               
               - 
               
                 
                   cos 
                   
                     - 
                     1 
                   
                 
                  
                 
                   b 
                   
                     
                       
                         a 
                         2 
                       
                       + 
                       
                         b 
                         2 
                       
                     
                   
                 
               
             
             &lt; 
             
               θ 
               max 
             
             ≤ 
             
               
                 cos 
                 
                   - 
                   1 
                 
               
                
               
                 
                   a 
                   
                     a 
                     + 
                     Δ 
                   
                 
                 . 
               
             
           
         
       
     
     According to at least one embodiment, 
     
       
         
           
             
               cos 
               
                 - 
                 1 
               
             
              
             
               a 
               
                 a 
                 + 
                 Δ 
               
             
           
         
       
     
     is a maximum rotatable angle θ max     —     wmax  of the electronic component  30  in the case in which 
     
       
         
           
             
               
                 w 
                 max 
               
               = 
               
                 ab 
                 
                   a 
                   + 
                   Δ 
                 
               
             
             , 
           
         
       
     
     w max  is a maximum connecting width of the connecting space  11  for any Δ, and 
     
       
         
           
             
               
                 sin 
                 
                   - 
                   1 
                 
               
                
               
                 
                   a 
                   + 
                   Δ 
                 
                 
                   
                     
                       a 
                       2 
                     
                     + 
                     
                       b 
                       2 
                     
                   
                 
               
             
             - 
             
               
                 cos 
                 
                   - 
                   1 
                 
               
                
               
                 b 
                 
                   
                     
                       a 
                       2 
                     
                     + 
                     
                       b 
                       2 
                     
                   
                 
               
             
           
         
       
     
     is a maximum rotatable angle in an independent cavity that does not have the connecting space  11  and has a length of a short side (when viewed on the plane) corresponding to a+Δ. 
     According to at least one embodiment, in a condition in which the maximum rotatable angle θ max  of the electronic component  30  accommodated in the embedding space  10   a  satisfies the following Equation: 
     
       
         
           
             
               
                 θ 
                 max 
               
               ≤ 
               
                 π 
                 4 
               
             
             , 
           
         
       
     
     the height h of the connecting space  11  (when viewed on the plane) satisfies the following Equation: w tan θ max ≦h≦a+Δ. According to at least one embodiment, referring to the dotted line rectangle of  FIGS. 3A and 3C  or  3 B, the height h of the connecting space  11  (when viewed on the plane) at the time of maximum rotation of the electronic component  30  in a condition of 
     
       
         
           
             
               θ 
               max 
             
             ≤ 
             
               π 
               4 
             
           
         
       
     
     is larger than or equal to a height up to a point R or R′ at which an extension line of a lower long side of the electronic component  30  meets one side  11   R  forming the connecting width of the connecting space  11 , thus, one side  11   R  coinciding with one short side  10   as  of the embedding space  10   a  and forming the connecting width of the connecting space  11 . Here, w tan θ max ≦h. 
     According to at least one embodiment, in a condition in which the maximum rotatable angle θ max  of the electronic component  30  satisfies the following Equation: 
     
       
         
           
             
               
                 θ 
                 max 
               
               ≥ 
               
                 π 
                 4 
               
             
             , 
           
         
       
     
     the height h of the connecting space  11  (when viewed on the plane) satisfies the following Equation: 
     
       
         
           
             
               w 
               
                 tan 
                  
                 
                     
                 
                  
                 
                   θ 
                   max 
                 
               
             
             ≤ 
             h 
             ≤ 
             
               a 
               + 
               
                 Δ 
                 . 
               
             
           
         
       
     
     According to at least one embodiment, referring to a solid line rectangle of  FIG. 3B  and/or referring to  FIG. 3D , the height h of the connecting space  11  (when viewed on the plane) at the time of maximum rotation of the electronic component  30  in a condition of 
     
       
         
           
             
               θ 
               max 
             
             ≥ 
             
               π 
               4 
             
           
         
       
     
     is larger than or equal to a height up to a point R Q  or R″ Q  at which an extension line of one short side of the electronic component  30  meets the other side  11   L  forming the connecting width of the connecting space  11 , thus, other side  11   L  coinciding with the lower long side  10   al  of the embedding space  10   a  and forming the connecting width of the connecting space  11 . Here, 
     
       
         
           
             
               w 
               
                 tan 
                  
                 
                     
                 
                  
                 
                   θ 
                   max 
                 
               
             
             ≤ 
             
               h 
               . 
             
           
         
       
     
     According to at least one embodiment, the height h of the connecting space  11  (when viewed on the plane) satisfies the following Equation: h≦2(b sin θ max +a cos θ max −(a+Δ)). Thus, the height h of the connecting space  11  (when viewed on the plane) is smaller than or equal to two times the height from the lower long side  10   al  of the embedding space  10   a  to the maximum falling vertex of the electronic component  30  at the time of maximum rotation of the electronic component  30  inserted into the embedding space  10   a.    
     According to at least one embodiment, 
     
       
         
           
             
               b 
               2 
             
             ≤ 
             
               w 
                
               
                   
               
                
               and 
                
               
                   
               
                
               Δ 
             
             ≤ 
             
               
                 ( 
                 
                   
                     2 
                   
                   - 
                   1 
                 
                 ) 
               
                
               
                 a 
                 . 
               
             
           
         
       
     
     Next, referring to  FIGS. 1 to 5 , the two or more electronic components  30  of the electronic component-embedded substrate are separately accommodated in the embedding spaces  10   a  and  10   b  of the cavity  10 , respectively. Here, the electronic components  30  separately accommodated in the embedding spaces  10   a  and  10   b , respectively, are separately accommodated so as not to contact each other. According to at least one embodiment, the electronic component  30  is a chip element, a passive element, or an active element. According to at least one embodiment, the electronic component  30  is a passive element having an electrode. Here, the passive element is a capacitor or an inductor. According to at least one embodiment, the passive element is a multilayer capacitor. 
     According to at least one embodiment, referring to  FIGS. 1 and 3A  to  3 C, the cavity  10  includes the first and second embedding spaces  10   a  and  10   b  connected to each other by the connecting space  11 , and the electronic components  30  is separately accommodated in the embedding spaces  10   a  and  10   b , respectively. In addition, referring to  FIGS. 2A and 2B , the cavity  10  includes first to third embedding spaces  10   a  to  10   c , a first connecting space  11  connecting the first and second embedding spaces  10   a  and  10   b  to each other, and a second connecting space  11  connecting the second and third embedding spaces  10   b  and  10   c  to each other. Here, referring to  FIG. 2A , one side  11   R  of a connecting width of the first connecting space  11  coincides with one short side  10   as  of the first embedding space  10   a  and meet an upper long side of the second embedding space  10   b , and the other side  11 L of the first connecting space  11  meets a lower long side  10   al  of the first embedding space  10   a  and coincide with the other short side of the second embedding space  10   b . In addition, one side of a connecting width of the second connecting space  11  coincides with one short side of the third embedding space  10   c  and meet a lower long side of the second embedding space  10   b , and the other side the second connecting space  11  meets an upper long side of the third embedding space  10   c  and coincide with the other short side of the second embedding space  10   b . Thus, the other side  11 L forming the connecting width of the first and second connecting spaces  11  and the other short side of the second embedding space  10   b  coincides with each other as one line and form the same surface. According to at least one embodiment, referring to  FIG. 2A , the cavity  10  is formed in a zigzag structure. In addition, referring to  FIG. 2B , the cavity  10  is formed in a step structure. Further, referring to  FIG. 2C , the cavity  10  includes four embedding spaces  10   a  to  10   d  and three connecting spaces  11  connecting between the embedding spaces. Here, the cavity  10  is formed in a zigzag structure. Alternatively, although not shown, the cavity  10  is formed in a step structure. Generally referring to  FIGS. 1 to 3C , in the case in which n is a natural number of 2 or more, the cavity  10  includes n embedding spaces and n−1 connecting spaces  11  connecting between two embedding spaces. 
     Another embodiment of the electronic component-embedded substrate will be described with reference to  FIG. 4 . Referring to  FIG. 4 , one end portion of at least one side  11 R forming a connecting width of a connecting space  11  is connected to a short side of any one  10   a  of first and second embedding spaces  10   a  and  10   b  so as to coincide therewith. In addition, the other end portion of the at least one side  11   R  is bent and meet a long side of the other embedding space  10   b . According to at least one embodiment, referring to  FIG. 4 , one side  11   R  of the connecting width of the connecting space  11  coincides with one short side  10   as  of the first embedding space  10   a  and meet an upper long side of the second embedding space  10   b , and one side of the other side  11   L  is bent at a portion at which it meets a lower long side  10   al  of the first embedding space  10   a  and then meet the lower long side  10   al  of the first embedding space  10   a  and the other side thereof coincides with the other short side of the second embedding space  10   b . Here, the connecting width w of the connecting space  11  is a long width of the connecting space  11  formed by a distal end of the other end portion, and the long width of the connecting space  11  is larger than a short width w L  of the connecting space  11  formed by a bent point of the other end portion. In addition, here, a maximum rotation angle is formed at a distal end of the other end portion at the time of maximum rotation of the electronic component  30  accommodated in the embedding space  10   a  or  10   b . Thus, when the electronic component  30  is maximally rotated, a lower long side of the electronic component  30  coincides with an inclined side between a distal end point P of the other end portion meeting the lower long side  10   al  of the first embedding space  10   a  and the bent point P L  of the other end portion or the distal end point P of the other end portion becomes a rotation origin point of the maximum rotation angle of the electronic component  30 . 
     According to at least one embodiment, referring to  FIG. 5 , the electronic component-embedded substrate according to at least one embodiment further includes an insulating layer  110  stacked so as to cover the cavity  10  into which the electronic components  30  are inserted and having a plurality of vias  120   a  formed therein so as to be electrically connected to the electronic components  30 . 
     Next, in order to solve the above-mentioned problem, an electronic component-embedded substrate according to a second aspect of the present invention will be described in detail with reference to the accompanying drawings. Here, a description will be provided with reference to exemplary embodiments of the electronic component-embedded substrate according to a first aspect of the present invention described above and  FIGS. 1 to 4 . 
       FIG. 5  is a cross-sectional view schematically showing an electronic component-embedded substrate according to another embodiment of the invention. 
     Referring to  FIG. 5 , the electronic component-embedded substrate according to at least one embodiment is configured to include the core substrate  100 , the cavity  10 , two or more electronic components  30 , and the insulating layer  110 . According to at least one embodiment, the cavity  10  and the two or more electronic components  30  will be described with reference to  FIGS. 1 to 4 . 
     First, referring to  FIGS. 1 to 5 , the cavity  10  is formed in the core substrate  100 . According to at least one embodiment, referring to  FIG. 5 , internal circuit patterns is formed on the core substrate  100 . According to at least one embodiment, the cavity  10  is formed so as to penetrate through a region in which the internal circuit patterns are not formed on the core substrate  100 . The cavity  10  includes two or more embedding spaces  10   a  and  10   b . According to at least one embodiment, the cavity  10  includes the first embedding space  10   a , which is one of the two or more embedding spaces  10   a  and  10   b , the second embedding space  10   b , which is the other of the two or more embedding spaces  10   a  and  10   b , and the connecting space  11  connecting the first and second embedding spaces  10   a  and  10   b  to each other. The first embedding space  10   a  is formed in a horizontal rectangular shape when viewed on the plane. The connecting space  11  is connected to a portion of the lower long side  10   al  of the first embedding space  10   a  and a portion of the upper long side of the second embedding space  10   b . According to at least one embodiment, the connecting width of the connecting space  11  means a section length at which the first embedding space  10   a  and the connecting space  11  are connected to each other or a section length at which the second embedding space  10   b  and the connecting space  11  are connected to each other. One side  11   R  (when viewed on the plane) forming the connecting width of the connecting space  11  coincides with one short side  10   as  of the first embedding space  10   a , and the other side  11   L  (when viewed on the plane) meets the lower long side  10   al  of the first embedding space  10   a . Here, one side  11   R  (when viewed on the plane) of the connecting width of the connecting space  11  meets the upper long side of the second embedding space  10   b , and the other side  11   L  (when viewed on the plane) coincides with the other short side of the second embedding space  10   b . The second embedding space  10   b  is formed in a horizontal rectangular shape when viewed on the plane. According to at least one embodiment, the second embedding space  10   b  has the other short side coinciding with the other side (when viewed on the plane) of the connecting width of the connecting space  11  and the upper long side meeting one side  11   R  (when viewed on the plane) of the connecting width. 
     Next, the two or more electrode components  30  are separately accommodated in the embedding spaces  10   a  and  10   b  of the cavity  10 , respectively. According to at least one embodiment, the electronic components  30  is maximally rotated at a point at which a side of the connecting space  11  and long sides of the embedding spaces  10   a  and  10   b  meet each other. In addition, the electronic components  30  accommodated in the cavity  10  are separately accommodated in the embedding spaces  10   a  and  10   b  of the cavity  10 , respectively, so as not to contact each other when they are maximally rotated. According to at least one embodiment, the electronic component  30  is a chip element, a passive element, or an active element. According to at least one embodiment, the electronic component  30  is a passive element having an electrode. According to at least one embodiment, the electronic component  30  is a multilayer capacitor. 
     According to at least one embodiment, a structure of the cavity  10  will be described in more detail with reference to  FIGS. 1 to 4 . According to at least one embodiment, the connecting width w of the connecting space  11  satisfies the following Equation: 
     
       
         
           
             
               a 
                
               
                   
               
                
               sin 
                
               
                   
               
                
               
                 θ 
                 i 
               
             
             &lt; 
             w 
             ≤ 
             
               
                 ab 
                 
                   a 
                   + 
                   Δ 
                 
               
               . 
             
           
         
       
     
     According to at least one embodiment, a is a length of a short side (when viewed on the plane) of the electronic component  30 , b is a length of a long side (when viewed on the plane) of the electronic component  30 , and Δ is a difference between a length of a short side of the embedding space  10   a  or  10   b  and a length of the short side of the electronic component  30 . In addition,  8   i  is a maximum rotatable angle in an independent cavity that does not have the connecting space  11  and has a length of a short side (when viewed on the plane) corresponding to a+Δ. 
     According to at least one embodiment, the larger the difference Δ between the length a+Δ of the short side of the embedding space  10   a  or  10   b  and the length a of the short side of the electronic component  30 , the larger the maximum rotatable angle of the electronic component  30  at the point P at which the other side  11   L  (when viewed on the plane) forming the connecting width of the connecting space  11  and the lower long side of the first embedding space meet each other and the larger the maximum value of the connecting width w of the connecting space  11 . According to at least one embodiment, the maximum value of the connecting width or the maximum connecting width of the connecting space  11  means a connecting width at which the electronic component  30  inserted into the embedding space  10   a  or  10   b  is rotated at a maximum rotation angle at the point P without getting out to the connecting space  11 . Thus, referring to  FIGS. 1 and 3A  to  3 D, in the maximum value of the connecting width w of the connecting space  11 , a maximum rising vertex S of two upper vertexes of the electronic component  30  coincides with a point P v  at which the extension line passing through the point P, which is the rotation origin point, and an upper long side of the embedding space  10   a  or  10   b  meet each other or an upper falling vertex Q or Q″ (See  FIG. 3C  or  3 D), which is the other of the two upper vertexes of the electronic component  30  coincides with a point P h . 
     According to at least one embodiment, in the case in which the maximum rising vertex S of the electronic component  30  coincides with the point P v  in  FIGS. 3A to 3D  and in the case in which the upper falling vertex Q or Q″ of the electronic component  30  coincides with the point P h  in  FIGS. 3C  and/or  3 D, the maximum connecting width w max  of the connecting space  11  for any Δ satisfies the following Equation: 
     
       
         
           
             
               w 
               max 
             
             = 
             
               
                 ab 
                 
                   a 
                   + 
                   Δ 
                 
               
               . 
             
           
         
       
     
     Since the maximum connecting width of the connecting space  11  for any Δ is 
     
       
         
           
             
               ab 
               
                 a 
                 + 
                 Δ 
               
             
             , 
           
         
       
     
     an allowable connecting width w of the connecting space  11  for any Δ is 
     
       
         
           
             w 
             ≤ 
             
               
                 ab 
                 
                   a 
                   + 
                   Δ 
                 
               
               . 
             
           
         
       
     
     According to at least one embodiment, according to one embodiment of the invention including the cavity  10  having the connecting space  11 , the maximum rotatable angle is larger than a maximum rotatable angle in an independent cavity that does not have the connecting space  11  and have a length of the short side (when viewed on the plane) corresponding to a+Δ. Here, referring to the electronic component  30  shown as the dotted line rectangle including vertexes S i , Q i , and T i  of  FIG. 1 , the connecting width w of the connecting space  11  satisfies the following Equation: a sin θ i &lt;w. 
     According to at least one embodiment, Δ satisfies the following Equation: 0&lt;Δ&lt;b−a. Here, a height h of the connecting space  11  (when viewed on the plane), which is a distance between a long side  10   al  of the first embedding space  10   a  and a long side of the second embedding space  10   b  neighboring to the first embedding space  10   a , satisfies the following Equation: h≦a+Δ. 
     According to at least one embodiment, referring to  FIGS. 3A to 3D , the height h of the connecting space  11  (when viewed on the plane) satisfies the following Equation: b sin θ max +a cos θ max −(a+Δ)&lt;h. θ max  is a maximum rotatable angle of the electronic component  30  accommodated in the embedding space  10   a  or  10   b . Here, b sin θ max +a cos θ max −(a+Δ) is a height from the lower long side  10   al  of the embedding space  10   a  to the maximum falling vertex of the electronic component  30  when the electronic component  30  inserted into the embedding space  10   a  or  10   b  is maximally rotated. 
     According to at least one embodiment, the maximum rotatable angle θ max  of the electronic component  30  accommodated in the embedding space  10   a  or  10   b  in a condition of the following Equation 1: 
     
       
         
           
             0 
             &lt; 
             Δ 
             &lt; 
             
               
                 
                   
                     
                       b 
                       2 
                     
                     + 
                     
                       b 
                        
                       
                         
                           
                             b 
                             2 
                           
                           - 
                           
                             4 
                              
                             
                               a 
                               2 
                             
                           
                         
                       
                     
                   
                   2 
                 
               
               - 
               a 
             
           
         
       
     
     and b&gt;2a satisfies the following Equation: 
     
       
         
           
             
               
                 
                   sin 
                   
                     - 
                     1 
                   
                 
                  
                 
                   
                     a 
                     + 
                     Δ 
                   
                   
                     
                       
                         a 
                         2 
                       
                       + 
                       
                         b 
                         2 
                       
                     
                   
                 
               
               - 
               
                 
                   cos 
                   
                     - 
                     1 
                   
                 
                  
                 
                   b 
                   
                     
                       
                         a 
                         2 
                       
                       + 
                       
                         b 
                         2 
                       
                     
                   
                 
               
             
             &lt; 
             
               θ 
               max 
             
             ≤ 
             
               
                 sin 
                 
                   - 
                   1 
                 
               
                
               
                 
                   
                     a 
                     + 
                     Δ 
                   
                   b 
                 
                 . 
               
             
           
         
       
     
     According to at least one embodiment, referring to  FIG. 1 , the maximum rotation angle θ i  in the independent cavity that does not have the connecting space  11  and has the length of the short side corresponding to a+Δ satisfies the following Equation: 
     
       
         
           
             
               θ 
               i 
             
             = 
             
               
                 
                   sin 
                   
                     - 
                     1 
                   
                 
                  
                 
                   
                     a 
                     + 
                     Δ 
                   
                   
                     
                       
                         a 
                         2 
                       
                       + 
                       
                         b 
                         2 
                       
                     
                   
                 
               
               - 
               
                 
                   cos 
                   
                     - 
                     1 
                   
                 
                  
                 
                   
                     b 
                     
                       
                         
                           a 
                           2 
                         
                         + 
                         
                           b 
                           2 
                         
                       
                     
                   
                   . 
                 
               
             
           
         
       
     
     Therefore, in an exemplary embodiment of the present invention including the connecting space  11 , the maximum rotatable angle θ max  of the electronic component  30  accommodated in the embedding space  10   a  or  10   b  satisfies the following Equation: 
     
       
         
           
             
               
                 
                   sin 
                   
                     - 
                     1 
                   
                 
                  
                 
                   
                     a 
                     + 
                     Δ 
                   
                   
                     
                       
                         a 
                         2 
                       
                       + 
                       
                         b 
                         2 
                       
                     
                   
                 
               
               - 
               
                 
                   cos 
                   
                     - 
                     1 
                   
                 
                  
                 
                   b 
                   
                     
                       
                         a 
                         2 
                       
                       + 
                       
                         b 
                         2 
                       
                     
                   
                 
               
             
             &lt; 
             
               
                 θ 
                 max 
               
               . 
             
           
         
       
     
     According to at least one embodiment, referring to  FIG. 3D , in the case in which the upper falling vertex Q″ of the electronic component  30  coincides with the point P h  before the maximum rising vertex of the electronic component  30  coincides with the point P v  depending on the maximum rotation of electronic component  30  satisfying the following Equation: b 2 &gt;2a 2  at the maximum connecting width w″ of the connecting space  11  depending on the increase in Δ 2  or the upper falling vertex and the maximum rising vertex simultaneously coincide with the point P h  and the point P v , respectively, 
     
       
         
           
             0 
             &lt; 
             
               Δ 
               2 
             
             ≤ 
             
               
                 
                   
                     
                       b 
                       2 
                       2 
                     
                     + 
                     
                       
                         b 
                         2 
                       
                        
                       
                         
                           
                             b 
                             2 
                             2 
                           
                           - 
                           
                             4 
                              
                             
                                 
                             
                              
                             
                               a 
                               2 
                               2 
                             
                           
                         
                       
                     
                   
                   2 
                 
               
               - 
               
                 
                   a 
                   2 
                 
                 . 
               
             
           
         
       
     
     Thus, in the case in which b&gt;2a, when the condition of Equation 1 is satisfied, the upper falling vertex Q″ of the electronic component  30  coincides with the point P h  (=P″ h ) and the connecting space  11  has the maximum connecting width w″. According to at least one embodiment, the maximum rotatable angle θ″ max     —     wmax  of the electronic component  30  accommodated in the embedding space  10   a  or  10   b  having the connecting space  11  of the maximum connecting width w″ satisfies the following Equation: 
     
       
         
           
             
               θ 
               
                 max 
                  
                 _ 
                  
                 wmax 
               
               ″ 
             
             = 
             
               
                 sin 
                 
                   - 
                   1 
                 
               
                
               
                 
                   
                     
                       a 
                       2 
                     
                     + 
                     
                       Δ 
                       2 
                     
                   
                   
                     b 
                     2 
                   
                 
                 . 
               
             
           
         
       
     
     Therefore, according to the present exemplary embodiment, the maximum rotatable angle θ max  of the electronic component  30  accommodated in the embedding space  10   a  or  10   b  having an allowable connecting width for Δ satisfies the following Equation: 
     
       
         
           
             
               θ 
               max 
             
             ≤ 
             
               
                 sin 
                 
                   - 
                   1 
                 
               
                
               
                 
                   
                     a 
                     + 
                     Δ 
                   
                   b 
                 
                 . 
               
             
           
         
       
     
     According to at least one embodiment, the maximum rotatable angle θ max  of the electronic component  30  in a condition in which Equation 1 is not satisfied or b≦2a will be described. First, in the case in which b&gt;2a and a condition of Equation 1 is not satisfied, although not directly shown, the portion shown as the dotted line in  FIG. 3D  will have a structure similar to that of a dotted line showing the case of Δ in  FIG. 3B . Since this case has a structure similar to a condition of b≦2a as shown in  FIGS. 3A to 3C , thus, the maximum rising vertex of the electronic component  30  coincides with the point P v  before the upper falling vertex of the electronic component  30  coincides with the point P h , the maximum rotatable angle θ max  of the electronic component  30  is similarly represented in the case in which b&gt;2a and the condition of Equation 1 is not satisfied and in the condition of b≦2a. Referring to  FIGS. 3A to 3C , the maximum rotatable angle θ max     —     wmax  of the electronic component  30  accommodated in the embedding space  10   a  or  10   b  having the connecting space  11  of the maximum connecting width w max  in the condition of b≦2a satisfies the following Equation: 
     
       
         
           
             
               θ 
               
                 max 
                  
                 _ 
                  
                 wmax 
               
             
             = 
             
               
                 cos 
                 
                   - 
                   1 
                 
               
                
               
                 
                   a 
                   
                     a 
                     + 
                     Δ 
                   
                 
                 . 
               
             
           
         
       
     
     Therefore, the maximum rotatable angle θ max  of the electronic component  30  accommodated in the embedding space  10   a  or  10   b  having an allowable connecting width for Δ satisfies the following Equation: 
     
       
         
           
             
               θ 
               max 
             
             ≤ 
             
               
                 cos 
                 
                   - 
                   1 
                 
               
                
               
                 
                   a 
                   
                     a 
                     + 
                     Δ 
                   
                 
                 . 
               
             
           
         
       
     
     Therefore, in the case in which b&gt;2a and the condition of Equation 1 is not satisfied, b&gt;2a and 
     
       
         
           
             
               Δ 
               ≥ 
               
                 
                   
                     
                       
                         b 
                         2 
                       
                       + 
                       
                         b 
                          
                         
                           
                             
                               b 
                               2 
                             
                             - 
                             
                               4 
                                
                               
                                   
                               
                                
                               
                                 a 
                                 2 
                               
                             
                           
                         
                       
                     
                     2 
                   
                 
                 - 
                 a 
               
             
             , 
           
         
       
     
     or the condition of b≦2a is satisfied, the maximum rotatable angle θ max  of the electronic component  30  accommodated in the embedding space  10   a  or  10   b  satisfies the following Equation: 
     
       
         
           
             
               
                 
                   sin 
                   
                     - 
                     1 
                   
                 
                  
                 
                   
                     a 
                     + 
                     Δ 
                   
                   
                     
                       
                         a 
                         2 
                       
                       + 
                       
                         b 
                         2 
                       
                     
                   
                 
               
               - 
               
                 
                   cos 
                   
                     - 
                     1 
                   
                 
                  
                 
                   b 
                   
                     
                       
                         a 
                         2 
                       
                       + 
                       
                         b 
                         2 
                       
                     
                   
                 
               
             
             &lt; 
             
               θ 
               max 
             
             ≤ 
             
               
                 cos 
                 
                   - 
                   1 
                 
               
                
               
                 
                   a 
                   
                     a 
                     + 
                     Δ 
                   
                 
                 . 
               
             
           
         
       
     
     Further, according to at least one embodiment, referring to a rectangle shown as a dotted line in  FIGS. 3A and 3C  or  3 B, in a condition in which the maximum rotatable angle θ max  of the electronic component  30  accommodated in the embedding space  10   a  or  10   b  satisfies the following Equation: 
     
       
         
           
             
               
                 θ 
                 max 
               
               ≤ 
               
                 π 
                 4 
               
             
             , 
           
         
       
     
     the height h of the connecting space  11  (when viewed on the plane) satisfies the following Equation: w tan θ max ≦h≦a+Δ. Further, referring to a rectangle shown as a solid line of  FIG. 3B  and/or  FIG. 3D , in a condition in which the maximum rotatable angle θ max  of the electronic component  30  satisfies the following Equation: 
     
       
         
           
             
               
                 θ 
                 max 
               
               ≥ 
               
                 π 
                 4 
               
             
             , 
           
         
       
     
     the height h of the connecting space  11  (when viewed on the plane) satisfies the following Equation: 
     
       
         
           
             
               w 
               
                 tan 
                  
                 
                     
                 
                  
                 
                   θ 
                   max 
                 
               
             
             ≤ 
             h 
             ≤ 
             
               a 
               + 
               
                 Δ 
                 . 
               
             
           
         
       
     
     According to at least one embodiment, the height h of the connecting space  11  (when viewed on the plane) satisfies the following Equation: h≦2(b sin θ max +a cos θ max −(a+Δ)). 
     According to at least one embodiment, 
     
       
         
           
             
               b 
               2 
             
             ≤ 
             w 
           
         
       
       
         
           and 
         
       
       
         
           
             Δ 
             ≤ 
             
               
                 ( 
                 
                   
                     2 
                   
                   - 
                   1 
                 
                 ) 
               
                
               
                 a 
                 . 
               
             
           
         
       
     
     According to at least one embodiment, generally referring to  FIGS. 1 to 3C , in the case in which n is a natural number of 2 or more, the cavity  10  includes n embedding spaces  10   a  and  10   b  and  n −1 connecting spaces  11  connecting between two embedding spaces  10   a  and  10   b.    
     According to at least one embodiment, referring to  FIG. 4 , one end portion of at least one side forming the connecting width of the connecting space  11  is connected to the short side of any one  10   a  or  10   b  of the first and second embedding spaces  10   a  and  10   b  so as to coincide therewith. In addition, the other end portion of the at least one side is bent and meet the long side of the other embedding space  10   a  or  10   b . According to at least one embodiment, the connecting width w of the connecting space  11  is a long width of the connecting space  11  formed by a distal end of the other end portion, and the long width of the connecting space  11  is larger than a short width W L  of the connecting space  11  formed by a bent point of the other end portion. According to at least one embodiment, a maximum rotation angle is formed at a distal end of the other end portion at the time of maximum rotation of the electronic component  30  accommodated in the embedding space  10   a  or  10   b.    
     Next, referring to  FIG. 5 , upper and lower insulating layers  110  of the electronic component-embedded substrate covers the electronic components  30  embedded in the cavity  10 . Here, a plurality of vias  120   a  are formed in at least one of the upper and lower insulating layers  111  and  113 . The vias  120   a  are electrically connected to electrodes  31  (See  FIGS. 2A to 2C ) of the electronic components  30  while penetrating through at least one of the upper and lower insulating layers  111  and  113 .  FIG. 5  shows that the vias  120   a  are formed in the upper insulating layer  111 . According to at least one embodiment, referring to  FIG. 5 , outer circuit patterns electrically connected to the vias  120   a  is formed on the insulating layer  110 . 
     Manufacturing Method of Electronic Component-Embedded Substrate 
     Next, a manufacturing method of an electronic component-embedded substrate according to a third aspect of the present invention will be described in detail with reference to the accompanying drawings. According to at least one embodiment, a description will be provided with reference to the electronic component-embedded substrates according to first and second aspects of the present invention described above and  FIGS. 1 to 5 . Therefore, overlapped descriptions will be omitted. 
       FIG. 6  is a flow chart schematically showing a manufacturing method of an electronic component-embedded substrate according to another embodiment of the invention. 
     Referring to  FIG. 6 , a manufacturing method of an electronic component-embedded substrate according to at least one embodiment includes a cavity forming step S 100 , an electronic component embedding step S 200 , and an insulating layer and via forming step S 300 . The respective steps will be described in detail with reference to the accompanying drawings. A structure of the cavity  100  in the cavity forming step S 100  will be described with reference to  FIGS. 1 and 3A  to  3 D. 
     According to at least one embodiment, referring to  FIG. 6 , in the cavity forming step S 100 , the cavity  10  configured that the two or more embedding spaces  10   a  and  10   b  having a rectangular shape when viewed on the plane are connected to each other by the connecting space  11  is formed in the core substrate  100 . According to at least one embodiment, neighboring long sides of the first and second embedding spaces  10   a  and  10   b  are partially connected to each other by the connecting space  11 . In addition, one side  11   R  (when viewed on the plane) of the connecting space  11  forming the connecting width of the connecting space  11  connecting the first and second embedding spaces  10   a  and  10   b  coincides with one short side  10   as  of the first embedding space  10   a , and the other side  11   L  (when viewed on the plane) thereof coincides with the other short side of the second embedding space  10   b . According to at least one embodiment, the two or more embedding spaces  10   a  and  10   b  of the cavity  10  are spaces into which two or more electronic components  30  are separately inserted without contacting each other. 
     According to at least one embodiment, in the cavity forming step S 100 , referring to  FIGS. 1 and 3A  to  3 D, the connecting width w of the connecting space  11  satisfies the following Equation: 
     
       
         
           
             
               a 
                
               
                   
               
                
               sin 
                
               
                   
               
                
               
                 θ 
                 i 
               
             
             &lt; 
             w 
             ≤ 
             
               
                 ab 
                 
                   a 
                   + 
                   Δ 
                 
               
               . 
             
           
         
       
     
     According to at least one embodiment, a is a length of a short side (when viewed on the plane) of the electronic component  30 , b is a length of a long side (when viewed on the plane) of the electronic component  30 , and Δ is a difference between a length a+Δ of a short side of the embedding space  10   a  or  10   b  and a length a of the short side of the electronic component  30 . θ i  is a maximum rotatable angle in an independent cavity that does not have the connecting space  11  and has a length of a short side (when viewed on the plane) corresponding to a+Δ. In an exemplary embodiment of the present invention, since the connecting space  11  is provided in the cavity  10 , a sin θ i &lt;w so that the maximum rotation angle of the electronic component  30  is larger than that of the electronic component  30  in the case in which the connecting space  11  is not provided. In addition, referring to  FIGS. 3A to 3D , the maximum connecting width w max  of the connecting space  11  for any Δ satisfies the following Equation: 
     
       
         
           
             
               w 
               max 
             
             = 
             
               
                 ab 
                 
                   a 
                   + 
                   Δ 
                 
               
               . 
             
           
         
       
     
     Therefore, the allowable connecting width w of the connecting space  11  for any Δ satisfies the following Equation: 
     
       
         
           
             w 
             ≤ 
             
               
                 ab 
                 
                   a 
                   + 
                   Δ 
                 
               
               . 
             
           
         
       
     
     According to at least one embodiment, in the cavity forming step S 100 , Δ satisfies the following Equation: 0&lt;Δ&lt;b−a. Further, in the cavity forming step S 100 , the cavity  10  is formed so that a height h of the connecting space  11  (when viewed on the plane), which is a distance between a long side  10   al  of the first embedding space  10   a  and a long side of the second embedding space  10   b , satisfies the following Equation: h≦a+Δ. 
     Further, according to at least one embodiment, in the cavity forming step S 100 , the cavity  10  is formed so that the maximum rotatable angle θ max  of the electronic component  30  accommodated in the embedding space  10   a  or  10   b  is implemented. According to at least one embodiment, generally referring to  FIGS. 1 and 3D , the cavity  10  is formed so that the upper falling vertex Q″ of the electronic component  30  coincides with the point P h  before the maximum rising vertex of the electronic component  30  coincides with the point P v  at the time of maximum rotation of electronic component  30  satisfying the following Equation: b&gt;2a at the maximum connecting width w max  of the connecting space  11  depending on the increase in Δ or the upper falling vertex and the maximum rising vertex simultaneously coincide with the point P h  and the point P v , respectively. According to at least one embodiment, the maximum rotatable angle θ max  of the electronic component  30  accommodated in the embedding space  10   a  or  10   b  is larger than a maximum rotatable angle in an independent cavity that does not have the connecting space  11  and has a length of the short side corresponding to a+Δ. Thus, the following Equation: 
     
       
         
           
             
               
                 
                   sin 
                   
                     - 
                     1 
                   
                 
                  
                 
                   
                     a 
                     + 
                     Δ 
                   
                   
                     
                       
                         a 
                         2 
                       
                       + 
                       
                         b 
                         2 
                       
                     
                   
                 
               
               - 
               
                 
                   cos 
                   
                     - 
                     1 
                   
                 
                  
                 
                   b 
                   
                     
                       
                         a 
                         2 
                       
                       + 
                       
                         b 
                         2 
                       
                     
                   
                 
               
             
             &lt; 
             
               θ 
               max 
             
           
         
       
     
     is satisfied. In addition, referring to  FIG. 3D , in the case in which the upper falling vertex Q″ of the electronic component  30  coincides with the point P h  before the maximum rising vertex of the electronic component  30  coincides with the point P v  depending on the maximum rotation of electronic component  30  satisfying the following Equation: b 2 &gt;2a 2  at the maximum connecting width w″ of the connecting space  11  depending on the increase in Δ 2  or the upper falling vertex and the maximum rising vertex simultaneously coincide with the point P h  and the point P v , respectively, 
     
       
         
           
             0 
             &lt; 
             
               Δ 
               2 
             
             ≤ 
             
               
                 
                   
                     
                       b 
                       2 
                       2 
                     
                     + 
                     
                       
                         b 
                         2 
                       
                        
                       
                         
                           
                             b 
                             2 
                             2 
                           
                           - 
                           
                             4 
                              
                             
                               a 
                               2 
                               2 
                             
                           
                         
                       
                     
                   
                   2 
                 
               
               - 
               
                 
                   a 
                   2 
                 
                 . 
               
             
           
         
       
     
     In this case, the maximum rotatable angle θ″ max     —     wmax  of the electronic component  30  accommodated in the embedding space  10   a  or  10   b  having the connecting space  11  of the maximum connecting width w″ satisfies the following Equation: 
     
       
         
           
             
               θ 
               
                 m 
                  
                 
                     
                 
                  
                 a 
                  
                 
                     
                 
                  
                 x_w 
                  
                 
                     
                 
                  
                 max 
               
               ″ 
             
             = 
             
               
                 sin 
                 
                   - 
                   1 
                 
               
                
               
                 
                   
                     
                       a 
                       2 
                     
                     + 
                     
                       Δ 
                       2 
                     
                   
                   
                     b 
                     2 
                   
                 
                 . 
               
             
           
         
       
     
     Therefore, the maximum rotatable angle θ max  of the electronic component  30  accommodated in the embedding space  10   a  or  10   b  having the allowable connecting width for a in a condition of the following Equation 1: 
     
       
         
           
             0 
             &lt; 
             Δ 
             &lt; 
             
               
                 
                   
                     
                       b 
                       2 
                     
                     + 
                     
                       b 
                        
                       
                         
                           
                             b 
                             2 
                           
                           - 
                           
                             4 
                              
                             
                               a 
                               2 
                             
                           
                         
                       
                     
                   
                   2 
                 
               
               - 
               a 
             
           
         
       
     
     and b&gt;2a satisfies the following Equation: 
     
       
         
           
             
               
                 
                   sin 
                   
                     - 
                     1 
                   
                 
                  
                 
                   
                     a 
                     + 
                     Δ 
                   
                   
                     
                       
                         a 
                         2 
                       
                       + 
                       
                         b 
                         2 
                       
                     
                   
                 
               
               - 
               
                 
                   cos 
                   
                     - 
                     1 
                   
                 
                  
                 
                   b 
                   
                     
                       
                         a 
                         2 
                       
                       + 
                       
                         b 
                         2 
                       
                     
                   
                 
               
             
             &lt; 
             
               θ 
               
                 m 
                  
                 
                     
                 
                  
                 ax 
               
             
             ≤ 
             
               
                 sin 
                 
                   - 
                   1 
                 
               
                
               
                 
                   
                     a 
                     + 
                     Δ 
                   
                   b 
                 
                 . 
               
             
           
         
       
     
     According to at least one embodiment, the maximum rotatable angle θ max  of the electronic component  30  in a condition in which b&gt;2a and Equation 1 is not satisfied or b≦2a will be described. First, the case in which b&gt;2a and the condition of Equation 1 is not satisfied has a structure similar to a condition of b≦2a as shown in  FIGS. 3A to 3C  since the maximum rising vertex of the electronic component  30  coincides with the point P v  before the upper falling vertex of the electronic component  30  coincides with the point P h , although not directly shown. According to at least one embodiment, the maximum rotatable angle θ max  of the electronic component  30  is similarly represented. Referring to  FIGS. 3A to 3C , the maximum rotatable angle θ″ max     —     wmax  of the electronic component  30  accommodated in the embedding space  10   a  or  10   b  having the connecting space  11  of the maximum connecting width w max  in the condition of b≦2a satisfies the following Equation: 
     
       
         
           
             
               θ 
               max_wmax 
             
             = 
             
               
                 cos 
                 
                   - 
                   1 
                 
               
                
               
                 
                   a 
                   
                     a 
                     + 
                     Δ 
                   
                 
                 . 
               
             
           
         
       
     
     Therefore, the maximum rotatable angle θ max  of the electronic component  30  accommodated in the embedding space  10   a  or  10   b  having an allowable connecting width for Δ satisfies the following Equation: 
     
       
         
           
             
               θ 
               
                 m 
                  
                 
                     
                 
                  
                 ax 
               
             
             ≤ 
             
               
                 cos 
                 
                   - 
                   1 
                 
               
                
               
                 
                   a 
                   
                     a 
                     + 
                     Δ 
                   
                 
                 . 
               
             
           
         
       
     
     Therefore, in the cavity forming step S 100 , the cavity  10  is formed so that the maximum rotatable angle θ max  of the electronic component  30  accommodated in the embedding space  10   a  or  10   b  satisfies the following Equation: 
     
       
         
           
             
               
                 
                   sin 
                   
                     - 
                     1 
                   
                 
                  
                 
                   
                     a 
                     + 
                     Δ 
                   
                   
                     
                       
                         a 
                         2 
                       
                       + 
                       
                         b 
                         2 
                       
                     
                   
                 
               
               - 
               
                 
                   cos 
                   
                     - 
                     1 
                   
                 
                  
                 
                   b 
                   
                     
                       
                         a 
                         2 
                       
                       + 
                       
                         b 
                         2 
                       
                     
                   
                 
               
             
             &lt; 
             
               θ 
               
                 m 
                  
                 
                     
                 
                  
                 ax 
               
             
             ≤ 
             
               
                 cos 
                 
                   - 
                   1 
                 
               
                
               
                 a 
                 
                   a 
                   + 
                   Δ 
                 
               
             
           
         
       
     
     in the case in which b&gt;2a and the condition of Equation 1 is not satisfied or the condition of b≦2a is satisfied. 
     According to at least one embodiment, describing the cavity forming step S 100  of  FIG. 6  with reference to  FIGS. 3A to 3D , in the cavity forming step S 100 , the cavity  10  is formed so that the height h of the connecting space  11  (when viewed on the plane) satisfies the following Equation: b sin θ max +a cos θ max −(a+Δ)&lt;h. Here, b sin θ max +a cos θ max −(a+Δ) is a height from the lower long side  10   al  of the embedding space  10   a  to the maximum falling vertex of the electronic component  30  when the electronic component  30  inserted into the embedding space  10   a  or  10   b  is maximally rotated. 
     According to at least one embodiment, in the cavity forming step S 100 , the cavity  10  is formed so that the height h of the connecting space  11  (when viewed on the plane) satisfies the following Equation: h≦2(b sin θ max +a cos θ max −(a+Δ)). Thus, the height h of the connecting space  11  (when viewed on the plane) is smaller than or equal to two times the height from the lower long side  10   al  of the embedding space  10   a  to the maximum falling vertex of the electronic component  30  at the time of maximum rotation of the electronic component  30  inserted into the embedding space  10   a  or  10   b.    
     According to at least one embodiment, referring to a rectangle shown as a dotted line in  FIGS. 3A and 3C  or  3 B, in the cavity forming step S 100  of  FIG. 6 , the cavity  10  is formed so that the height h of the connecting space  11  (when viewed on the plane) satisfies the following Equation: w tan θ max ≦h≦a+Δ in a condition in which the maximum rotatable angle θ max  of the electronic component  30  accommodated in the embedding space  10   a  or  10   b  satisfies the following Equation: 
     
       
         
           
             
               θ 
               
                 m 
                  
                 
                     
                 
                  
                 ax 
               
             
             ≤ 
             
               
                 π 
                 4 
               
               . 
             
           
         
       
     
     Further, referring to a rectangle shown as a solid line of  FIG. 3B  and/or  FIG. 3D , the cavity  10  is formed so that the height h of the connecting space  11  (when viewed on the plane) satisfies the following Equation: 
     
       
         
           
             
               
                 w 
                 
                   tan 
                    
                   
                       
                   
                    
                   
                     θ 
                     
                       m 
                        
                       
                           
                       
                        
                       ax 
                     
                   
                 
               
               ≤ 
               h 
               ≤ 
               
                 a 
                 + 
                 Δ 
               
             
             , 
           
         
       
     
     in a condition in which the maximum rotatable angle θ max  of the electronic component  30  satisfies the following Equation: 
     
       
         
           
             
               θ 
               
                 m 
                  
                 
                     
                 
                  
                 ax 
               
             
             ≥ 
             
               
                 π 
                 4 
               
               . 
             
           
         
       
     
     In another embodiment, in the cavity forming step S 100 , the cavity  10  is formed so that 
     
       
         
           
             
               b 
               2 
             
             ≤ 
             
               w 
                
               
                   
               
                
               and 
                
               
                   
               
                
               Δ 
             
             ≤ 
             
               
                 ( 
                 
                   
                     2 
                   
                   - 
                   1 
                 
                 ) 
               
                
               
                 a 
                 . 
               
             
           
         
       
     
     Next, referring to  FIG. 6 , in the electronic component embedding step S 200 , the two or more electronic components  30  are separately inserted in the embedding spaces  10   a  and  10   b  of the cavity  10 , respectively. 
     Continuously referring to  FIG. 6 , in the insulating and via forming step S 300 , the cavity  10  into which the electronic components  30  are inserted is covered with the insulating layer(s)  110 . In addition, the plurality of vias  120   a  electrically connected to the electronic components  30  while penetrating through the insulating layer(s)  110  are formed. 
     According to various embodiments of the invention, the cavity structure is improved so that one cavity includes the two or more embedding spaces into which the electronic components are to be inserted, respectively, and the connecting space connecting the embedding spaces to each other, thereby making it possible to prevent a short-circuit between the electronic components inserted into the cavity. 
     According to at least one embodiment, a shift range of the electronic component is limited to a range within an allowable rotation radius so that the electronic component inserted into the embedding space of the cavity does not get out to the connecting space, thereby making it possible to improve an eccentricity defect of the via. 
     Further, according to at least one embodiment, only portions of long sides of the embedding spaces are connected to each other by the connecting space to generally decrease a margin space except for the electronic components in the cavity, thereby making it possible to improve a void problem, or the like, on the insulating layer stacked on the cavity. 
     Terms used herein are provided to explain embodiments, not limiting the invention. Throughout this specification, the singular form includes the plural form unless the context clearly indicates otherwise. When terms “comprises” and/or “comprising” used herein do not preclude existence and addition of another component, step, operation and/or device, in addition to the above-mentioned component, step, operation and/or device. 
     Embodiments of the invention may suitably comprise, consist or consist essentially of the elements disclosed and may be practiced in the absence of an element not disclosed. According to at least one embodiment, it can be recognized by those skilled in the art that certain steps can be combined into a single step. 
     The terms and words used in the specification and claims should not be interpreted as being limited to typical meanings or dictionary definitions, but should be interpreted as having meanings and concepts relevant to the technical scope of the invention based on the rule according to which an inventor can appropriately define the concept of the term to describe the best method he or she knows for carrying out the invention. 
     The terms “first,” “second,” “third,” “fourth,” and the like in the description and in the claims, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments of the invention described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Similarly, if a method is described herein as comprising a series of steps, the order of such steps as presented herein is not necessarily the only order in which such steps may be performed, and certain of the stated steps may possibly be omitted and/or certain other steps not described herein may possibly be added to the method. 
     The singular forms “a,” “an,” and “the” include plural referents, unless the context clearly dictates otherwise. 
     As used herein and in the appended claims, the words “comprise,” “has,” and “include” and all grammatical variations thereof are each intended to have an open, non-limiting meaning that does not exclude additional elements or steps. 
     As used herein, it will be understood that unless a term such as ‘directly’ is not used in a connection, coupling, or disposition relationship between one component and another component, one component may be ‘directly connected to’, ‘directly coupled to’ or ‘directly disposed to’ another element or be connected to, coupled to, or disposed to another element, having the other element intervening therebetween. 
     As used herein, the terms “left,” “right,” “front,” “back,” “top,” “bottom,” “over,” “under,” and the like in the description and in the claims, if any, are used for descriptive purposes and not necessarily for describing permanent relative positions. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments of the invention described herein are, for example, capable of operation in other orientations than those illustrated or otherwise described herein. The term “coupled,” as used herein, is defined as directly or indirectly connected in an electrical or non-electrical manner. Objects described herein as being “adjacent to” each other may be in physical contact with each other, in close proximity to each other, or in the same general region or area as each other, as appropriate for the context in which the phrase is used. Occurrences of the phrase “according to an embodiment” herein do not necessarily all refer to the same embodiment. 
     Ranges may be expressed herein as from about one particular value, and/or to about another particular value. When such a range is expressed, it is to be understood that another embodiment is from the one particular value and/or to the other particular value, along with all combinations within said range. 
     Although the invention has been described in detail, it should be understood that various changes, substitutions, and alterations can be made hereupon without departing from the principle and scope of the invention. Accordingly, the scope of the invention should be determined by the following claims and their appropriate legal equivalents.