Patent Publication Number: US-2023132788-A1

Title: Coil component and method of manufacturing the same

Description:
CROSS-REFERENCE TO RELATED APPLICATION(S) 
     This application claims benefit of priority to Korean Patent Application No.  10 - 2021 - 0146449  filed on Oct. 29, 2021 in the Korean Intellectual Property Office, the disclosure of which is incorporated herein by reference in its entirety. 
     TECHNICAL FIELD 
     The present disclosure relates to a coil component. 
     BACKGROUND 
     An inductor, a coil component, is a representative passive electronic component used in an electronic device together with a resistor and a capacitor. 
     As the electronic device implements high-performance and has a smaller size, the electronic component used in the electronic device may have increased numbers and a smaller size. 
     In recent years, mainly used as the inductor is a bottom-electrode type product in which all five surfaces of the coil component are insulated except for a region of a bottom electrode, which leads to an increasing development of a new bottom-electrode type product. 
     In order to manufacture the bottom-electrode type product in which the electrodes are formed only in one direction, research is continued to solve a problem in which defects frequently occur due to a singularity occurring in a structure of a product. 
     SUMMARY 
     An aspect of the present disclosure may provide a coil component including a microcircuit pattern, which may be mounted on a board. 
     Another aspect of the present disclosure may provide a coil component including a coil with less loss of a magnetic metal. 
     According to an aspect of the present disclosure, a coil component may include: a body including one surface and a plurality of side surfaces respectively connected to the one surface; a coil portion disposed within the body; and a lead-out portion disposed within the body and connected to the coil portion. The body may include a groove portion disposed in a corner where two adjacent side surfaces of the plurality of side surfaces of the body are in contact with each other. The groove portion may have a width narrower than a width of the body, and extend from a portion of the lead-out portion. 
     According to another aspect of the present disclosure, a manufacturing method of a coil component may include: preparing forming a coil bar on which a magnetic sheet covering each of a coil portion and a lead-out portion connected to each other is stacked; forming at least one groove portion in one surface of the coil bar; and preparing a body including one surface and the other surface opposing each other in a thickness direction by routing the coil bar along a plurality of routing lines to expose at least a portion of the lead-out portion. The groove portion may be formed in a region where the plurality of routing lines intersect each other. 
     According to another aspect of the present disclosure, a coil component may include: a body including one surface and a plurality of side surfaces respectively connected to the one surface; a coil portion disposed within the body; a lead-out portion disposed within the body and connected to the coil portion; and an external electrode disposed on the body. The body may include a groove portion extending from the one surface and one or more of the plurality of side surfaces to a portion of the lead-out portion. The groove portion may have a width narrower than a width of the body and is filled with an insulating material. The external electrode may be connected to the lead-out portion through a conductive layer disposed on a surface of the groove portion and connected to the lead-out portion. 
    
    
     
       BRIEF DESCRIPTION OF DRAWINGS 
       The above and other aspects, features and advantages of the present disclosure will be more clearly understood from the following detailed description taken in conjunction with the accompanying drawings, in which: 
         FIG.  1    is a perspective view of a coil component according to the present disclosure; 
         FIG.  2    is a perspective view of another coil component according to the present disclosure; 
         FIG.  3    is a cross-sectional view taken along line I-I′ of  FIG.  1   ; 
         FIG.  4    is a cross-sectional view taken along line II-II′ of  FIG.  2   ; 
         FIG.  5    is a perspective view of yet another coil component according to the present disclosure; 
         FIG.  6    is a perspective view of still another coil component according to the present disclosure; and 
         FIGS.  7 A through  7 C  are views schematically illustrating a manufacturing method of a coil component according to the present disclosure. 
     
    
    
     DETAILED DESCRIPTION 
     Hereinafter, exemplary embodiments in the present disclosure will now be described in detail with reference to the accompanying drawings. 
     In the drawings, a T direction refers to a first direction or a thickness direction, a W direction refers to a second direction or a width direction, and an L direction refers to a third direction or a length direction. 
     Hereinafter, a coil component according to exemplary embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. In describing exemplary embodiments of the present disclosure with reference to the accompanying drawings, components that are the same as or correspond to each other will be denoted by the same reference numerals, and overlapping descriptions thereof will be omitted. 
     Various kinds of electronic components may be used in an electronic device, and various kinds of coil components may be appropriately used between these electronic components depending on their purposes in order to remove noise or the like. 
     That is, the coil component used in the electronic device may be a power inductor, high frequency (HF) inductor, a general bead, a bead for a high frequency (GHz), a common mode filter or the like. 
     Coil Component 
       FIG.  1    is a perspective view of a coil component according to the present disclosure. 
     Referring to the drawing, a coil component  10 A according to an exemplary embodiment of the present disclosure may include: a body  100  including one surface  100 A and the other surface  100 B opposing the one surface  100 A and first to fourth side surfaces  101 ,  102 ,  103  and  104  respectively connected to the one surface  100 A and adjacent to each other; and a lead-out portion  200  disposed within the body  100 . The body may include a groove portion GV disposed in the one surface  100 A of the body by having a length in the width (W) direction shorter than a length of the body  100  in the width (W) direction, and exposing at least a portion of the lead-out portion  200 . 
     In addition, the lead-out portion  200  may include a connection portion  210  in contact with at least a portion of the one surface  100 A of the body, and is not limited thereto. In more detail, an external electrode  500  described below may be in direct contact with the lead-out portion  200  or in contact with the connection portion  210  of the lead-out portion  200 , and is not limited thereto. 
     The groove portion GV of the coil component  10 A according to the present disclosure may include first and second groove portions G 1  and G 2  respectively disposed in two opposite ends of the second side surface  102  of the body in the length direction, while being spaced apart from each other, and respectively extended to the first and third side surfaces  101  and  103  of the body, adjacent to the second side surface  102 . Here, the lead-out portion  200  may be formed close to the groove portion GV in the first side surface  101  of the body to be exposed from the groove portion GV. 
     In addition, the groove portion GV may have a length shorter than a length of the body  100 , based on a thickness (T) direction of the coil component  10 A according to the present disclosure. That is, the groove portion GV may not entirely pass through the body in the thickness (T) direction, and is not limited thereto. 
     Here, the groove portion GV may be extended to each of two side surfaces adjacent to each other among the first to fourth side surfaces  101  to  104  of the body, and is not limited thereto. 
     In addition, the groove portion GV may include a first region R 1  formed in the one surface  100 A of the body and a second region R 2  having a greatest distance from the one surface  100 A of the body in the thickness (T) direction, and the first region R 1  of the groove portion GV may have a size such as a diameter larger than a size such as a diameter of the second region R 2  of the groove portion. That is, the groove portion GV may become narrower toward the inside of the body  100 , and is not limited thereto. 
     The groove portion GV may have a tapered shape, and it is thus possible to reduce loss of the body  100  including a magnetic material described below, and to reduce occurrence of defective products by exposing the lead-out portion  200 . 
     In addition, the coil component  10 A according to the present disclosure may further include a coil portion  300  disposed within the body  100  and connected to the lead-out portion  200  and an insulating layer  400  covering the coil portion  300 , and at least a portion of the insulating layer  400  may be exposed to the groove portion GV. 
     In addition, the coil portion  300  of the coil component  10 A according to the present disclosure may include a board  310  and a coil pattern  320  disposed on each of one surface and the other surface of the board. That is, the coil component may be a thin-film type coil component. 
     Here, the coil pattern  320  may be disposed on each of the upper and lower portions of the board  310 , and a via may pass through the board  310  to connect the coil patterns disposed on the upper and lower portions thereof, and is not limited thereto. 
     In addition, at least a portion of the board  310  may be exposed to each of two side surfaces of the body  100 , opposing each other, and is not limited thereto. 
     Here, the insulating layer  400  may function to insulate the body  100  and the coil pattern  320  from each other, and is not limited thereto. In addition, the insulating layer  400  may be extended to cover the board  310 . 
     In addition, the coil component  10 A according to the present disclosure may further include a plating layer  600  disposed on at least a portion of each of the one surface  100 A and the groove portion GV of the body and in contact with at least a portion of the exposed lead-out portion  200 , first and second external electrodes  501  and  502  each in contact with at least a portion of the plating layer  600 , and disposed on the one surface  100 A of the body, while being spaced apart from each other, and an insulating material  700  ( 700  is omitted in  FIG.  1    and is shown in  FIG.  3   ) disposed in the groove portion GV and in contact with at least a portion of the plating layer  600 . Here, the insulating material  700  may be extended to at least one of the first to fourth side surfaces  101  to  104  of the body, and is not limited thereto. In addition, each of the first and second external electrodes  501  and  502  may be extended to the two side surfaces of the body  100 , opposing each other. 
     The insulating material  700  may cover five surfaces of the body except for the other surface  100 B, thus forming the coil component  10 A including a bottom electrode which is the electrode disposed only in one direction. 
     The body  100  may form an appearance of the coil component  10 A according to this exemplary embodiment, and may embed the coil portion  300  therein. The body  100  may generally have a hexahedral shape. 
     The body  100  may include the magnetic material and an insulating resin. In detail, the body  100  may be formed by stacking at least one magnetic composite sheet including the insulating resin and the magnetic materials dispersed in the insulating resin. However, the body  100  may have a structure other than a structure in which the magnetic materials are dispersed in the insulating resin. For example, the body  100  may be made of the magnetic material such as ferrite. 
     The magnetic material may be ferrite or metal magnetic powder particles. 
     The ferrite powder particles may include, for example, at least one of a spinel type ferrite such as Mg—Zn-based ferrite, Mn—Zn-based ferrite, Mn—Mg-based ferrite, Cu—Zn-based ferrite, Mg—Mn—Sr-based ferrite or Ni—Zn-based ferrite; a hexagonal type ferrite such as Ba—Zn-based ferrite, Ba—Mg-based ferrite, Ba—Ni-based ferrite, Ba—Co-based ferrite or Ba—Ni—Co-based ferrite; and a garnet type ferrite such as Y-based ferrite or Li-based ferrite. 
     The metal magnetic powder particles may include one or more selected from the group consisting of iron (Fe), silicon (Si), chromium (Cr), cobalt (Co), molybdenum (Mo), aluminum (Al), niobium (Nb), copper (Cu) and nickel (Ni). For example, the metal magnetic powder particles may be one or more of pure iron powder particles, Fe—Si-based alloy powder particles, Fe—Si—Al-based alloy powder particles, Fe—Ni-based alloy powder particles, Fe—Ni—Mo-based alloy powder particles, Fe—Ni—Mo—Cu-based alloy powder particles, Fe—Co-based alloy powder particles, Fe—Ni—Co-based alloy powder particles, Fe—Cr-based alloy powder particles, Fe—Cr—Si-based alloy powder particles, Fe—Si—Cu—Nb-based alloy powder particles, Fe—Ni—Cr-based alloy powder particles and Fe—Cr—Al-based alloy powder particles. 
     The metal magnetic powder particles may be amorphous or crystalline. For example, the metal magnetic powder particles may be Fe—Si—B—Cr based amorphous alloy powder particles, and are not necessarily limited thereto. 
     The ferrite and the metal magnetic powder particles may have average diameters of about 0.1 μm to 30 μm, respectively, and are not limited thereto. 
     The body  100  may include two or more types of magnetic materials dispersed in the insulating resin. Here, different types of magnetic materials may indicate that the magnetic materials dispersed in the insulating resin are distinguished from each other by any one of an average diameter, a composition, crystallinity and a shape. 
     The insulating resin may include epoxy, polyimide, liquid crystal polymer (LCP) or the like, or a mixture thereof, and is not limited thereto. 
     The lead-out portion  200  and the coil portion  300  may each be embedded in the body  100 . The coil portion  300  may exhibit a characteristic of the coil component according to the present disclosure. For example, when the coil component of this exemplary embodiment is used as a power inductor, the coil portion  300  may serve to store an electric field as a magnetic field to maintain an output voltage, thereby stabilizing power of the electronic device. Here, the coil portion  300  may not be limited to a thin-film coil, and may be a wound-type coil or a stacked-type coil. 
     Each of the coil pattern  320  of the coil portion, the lead-out portion  200  and the via may be formed of a conductive material such as copper (Cu), aluminum (Al), silver (Ag), tin (Sn), gold (Au), nickel (Ni), lead (Pb), titanium (Ti) or an alloy thereof, and is not limited thereto. 
     The board  310  of the coil portion may be formed of an insulating material including a thermosetting insulating resin such as an epoxy resin, a thermoplastic insulating resin such as polyimide or a photosensitive insulating resin, or an insulating material impregnated with a reinforcing material such as a glass fiber or inorganic filler in the insulating resin. For example, the board  310  may be formed of the insulating material such as a copper clad laminate (CCL), an unclad CCL, prepreg, an Ajinomoto build-up film (ABF), FR-4, a bismaleimide triazine (BT) film or a photo imagable dielectric (PID) film, and is not limited thereto. 
     The inorganic filler may use one or more materials selected from the group consisting of silica (SiO 2 ), alumina (Al 2 O 3 ), silicon carbide (SiC), barium sulfate (BaSO 4 ), talc, clay, mica powder particles, aluminum hydroxide (AlOH 3 ), magnesium hydroxide (Mg(OH) 2 ), calcium carbonate (CaCO 3 ), magnesium carbonate (MgCO 3 ), magnesium oxide (MgO), boron nitride (BN), aluminum borate (AlBO 3 ), barium titanate (BaTiO 3 ) and calcium zirconate (CaZrO 3 ). 
     When formed of the insulating material including the reinforcing material, the board  310  may provide higher rigidity. The board  310  may be formed of the insulating material not including the glass fiber, which may be advantageous because the coil portion  300  may have an increased volume in the body  100  having the same size. 
     When the board  310  is formed of the insulating material including the photosensitive insulating resin, it is possible to reduce the number of processes of forming the coil portion  300 , which may be advantageous in reducing a production cost and forming a fine via. 
     A metal included in the external electrode  500  having the first and second external electrodes  501  and  502  may each be made of an alloy of two or more selected from the group consisting of tin (Sn), lead (Pb), indium (In), copper (Cu), silver (Ag) and bismuth (Bi). 
     The external electrode  500  may be formed by applying a conductive resin paste or may be formed by plating a material including the metal material, and is not limited thereto. 
     The insulating layer  400  surrounding the coil portion  300  may be formed by using at least one of a vapor deposition method and a film lamination method. Meanwhile, the insulating layer  400  formed by using the latter method may be a permanent resist in which a plating resist used in plating the coil portion  300  on the board  310  remains in a final product, and is not limited thereto. 
     In addition, the external electrode  500  may further include a plating layer. Here, the plating layer may include the conductive material. The plating layer may be electrically connected to a solder, which is a connecting conductor. Here, the plating layer may include nickel (Ni) or tin (Sn), and may have a structure in which a nickel (Ni) plating layer and a tin (Sn) plating layer are sequentially stacked. When the external electrode is a conductive resin layer, the nickel (Ni) plating layer may be in contact with the conductive connection portion and base resin of the conductive resin layer in the external electrode  500 . 
       FIG.  2    is a perspective view of another coil component according to the present disclosure. 
     Referring to the drawing, a groove portion GV of a coil component  10 B according to another exemplary embodiment of the present disclosure may include a third groove portion G 3  extended to the first and second side surfaces  101  and  102  of the body, adjacent to each other, and a fourth groove portion G 4  extended to the third and fourth side surfaces  103  and  104  of the body, adjacent to each other. Here, the third and fourth groove portions G 3  and G 4  may be spaced apart from each other, and are not limited thereto. In addition, the third and fourth groove portions G 3  and G 4  may each have a length in the thickness (T) direction shorter than a length of the body  100  in the thickness (T) direction. 
     The groove portion GV of the coil component  10 B according to the present disclosure may include the third groove portion G 3  formed in a region where the one surface  100 A of the body and the first and second side surfaces  101  and  102  of the body meet one another, and the fourth groove portion G 4  formed in a region where the one surface  100 A of the body and the third and fourth side surfaces  103  and  104  of the body meet one another. Here, the lead-out portion  200  may be formed close to the groove portion GV in the first and third side surfaces  101  and  103  of the body to be exposed from the third and fourth groove portions G 3  and G 4 , and is not limited thereto. 
     In addition, the groove portion GV may have the length shorter than the length of the body  100 , based on the thickness (T) direction of the coil component  10 B according to the present disclosure. That is, the groove portion GV may not entirely pass through the body in the thickness (T) direction, and is not limited thereto. 
     Here, the groove portion GV may be extended to each of two side surfaces adjacent to each other among the first to fourth side surfaces  101  to  104  of the body, and is not limited thereto. 
     In addition, the groove portion GV may become narrower toward the inside of the body  100 , and is not limited thereto. 
     The groove portion GV may have a tapered shape, and it is thus possible to reduce loss of the body  100  including a magnetic material, and to reduce occurrence of defective products by exposing the lead-out portion  200 . 
     Descriptions of the other components are substantially the same as those described above, and detailed descriptions thereof are thus omitted. 
       FIG.  3    is a cross-sectional view taken along line I-I′ of  FIG.  1   . Here, the line I-I′ of  FIG.  1    may cross each of the first and second groove portions G 1  and G 2  of the groove portion GV. 
     Referring to the drawing, the coil component  10 A according to an exemplary embodiment of the present disclosure may include the body  100 , the lead-out portion  200  and the coil portion  300  disposed within the body, the plating layer  600  disposed on each of the one surface  100 A of the body and the groove portion GV, the insulating material  700  maintaining the hexahedral shape of the body  100  by filling the groove portion GV, and the external electrode  500  disposed on the one surface  100 A of the body and connected to the plating layer  600 . 
     Here, at least a portion of the lead-out portion  200  may be exposed to the groove portion GV, and the exposed lead-out portion  200  may be in contact with the plating layer  600 . In addition, the lead-out portion  200  may include the connection portion  210  having at least a portion exposed to the groove portion GV to be in contact with least one of the plating layer  600  and the external electrode  500 , and is not limited thereto. 
     In addition, the groove portion GV of the coil component  10 A according to the present disclosure may include the first region R 1  formed in the one surface  100 A of the body and the second region R 2  having the greatest distance from the one surface  100 A of the body in the thickness (T) direction, and the first region R 1  of the groove portion GV may have the size such as the diameter larger than the size such as the diameter of the second region R 2  of the groove portion. That is, the groove portion GV may become narrower toward the inside of the body  100 , and is not limited thereto. 
     The groove portion GV may have the tapered shape, and it is thus possible to reduce the loss of the body  100  including the magnetic material, and to reduce the occurrence of the defective products by exposing the lead-out portion  200 . 
     Descriptions of the other components are substantially the same as those described above, and detailed descriptions thereof are thus omitted. 
       FIG.  4    is a cross-sectional view taken along line II-II′ of  FIG.  2   . Here, the line II-II′ of  FIG.  2    may cross at least one of the third and fourth groove portions G 3  and G 4  of the groove portion GV. 
     Referring to the drawing, the coil component  10 B according to another exemplary embodiment of the present disclosure may include the body  100 , the lead-out portion  200  and the coil portion  300  disposed within the body, the plating layer  600  disposed on each of the one surface  100 A of the body and the groove portion GV, the insulating material  700  maintaining the body  100  to have the hexahedral shape by filling the groove portion GV, and the external electrode  500  disposed on the one surface  100 A of the body and connected to the plating layer  600 . 
     Here, at least a portion of the lead-out portion  200  may be exposed to the groove portion GV, and the exposed lead-out portion  200  may be in contact with the plating layer  600 . In addition, the lead-out portion  200  may include the connection portion  210  having at least a portion exposed to the groove portion GV to be in contact with least one of the plating layer  600  and the external electrode  500 , and is not limited thereto. 
     In addition, the groove portion GV of the coil component  10 B according to the present disclosure may include the first region R 1  formed in the one surface  100 A of the body and the second region R 2  having the greatest distance from the one surface  100 A of the body in the thickness (T) direction, and the first region R 1  of the groove portion GV may have the size such as the diameter larger than the size such as the diameter of the second region R 2  of the groove portion. That is, the groove portion GV may become narrower toward the inside of the body  100 , and is not limited thereto. 
     The groove portion GV may have the tapered shape, and it is thus possible to reduce the loss of the body  100  including the magnetic material, and to reduce the occurrence of the defective products by exposing the lead-out portion  200 . 
     Descriptions of the other components are substantially the same as those described above, and detailed descriptions thereof are thus omitted. 
       FIG.  5    is a perspective view of yet another coil component according to the present disclosure. 
     Referring to the drawing, a coil component  10 C according to yet another exemplary embodiment of the present disclosure may include: a body  100  including one surface  100 A and the other surface  100 B opposing the one surface  100 A and first to fourth side surfaces  101 ,  102 ,  103  and  104  respectively connected to the one surface  100 A and adjacent to each other; and a lead-out portion  200  disposed within the body  100 . The body may include a groove portion GV disposed in the one surface  100 A of the body by having a length in the width (W) direction shorter than a length of the body  100  in the width (W) direction, and exposing at least a portion of the lead-out portion  200 . 
     The groove portion GV of the coil component  10 C according to the present disclosure may include first and second groove portions G 1  and G 2  respectively disposed in two opposite ends of the second side surface  102  of the body in the length direction, while being spaced apart from each other, and respectively extended to the first and third side surfaces  101  and  103  of the body, adjacent to the second side surface  102 . Here, the lead-out portion  200  may be formed close to the groove portion GV in the first side surface  101  of the body to be exposed from the groove portion GV. 
     In addition, the groove portion GV may have a length shorter than a length of the body  100 , based on the thickness (T) direction of the coil component  10 C according to the present disclosure. That is, the groove portion GV may not entirely pass through the body in the thickness (T) direction, and is not limited thereto. 
     Here, the groove portion GV may be extended to each of two side surfaces adjacent to each other among the first to fourth side surfaces  101  to  104  of the body, and is not limited thereto. 
     In addition, the groove portion GV may include a first region R 1  formed in the one surface  100 A of the body and a second region R 2  having a greatest distance from the one surface  100 A of the body in the thickness (T) direction, and the first region R 1  of the groove portion GV may have a size such as a diameter larger than a size such as a diameter of the second region R 2  of the groove portion. That is, the groove portion GV may become narrower toward the inside of the body  100 , and is not limited thereto. 
     The groove portion GV may have a tapered shape, and it is thus possible to reduce loss of the body  100  including a magnetic material described below, and to reduce occurrence of defective products by exposing the lead-out portion  200 . 
     In addition, the coil portion  300  of the coil component  10 C according to the present disclosure may be a wound-type coil, and is not limited thereto. Here, the coil portion  300  may be embedded in the body  100 , and include two coil patterns  320  at least some of which are in contact with each other. 
     In addition, the coil component  10 C according to the present disclosure may further include a plating layer  600  (see  600  shown in  FIG.  3    or  FIG.  4   ) disposed on at least a portion of each of the one surface  100 A and the groove portion GV of the body and in contact with at least a portion of the exposed lead-out portion  200 , first and second external electrodes  501  and  502  each in contact with at least a portion of the plating layer  600 , and disposed on the one surface  100 A of the body, while being spaced apart from each other, and an insulating material  700  ( 700  is omitted in  FIG.  5    and its corresponding structure may be referred to  FIG.  3    or  FIG.  4   ) disposed in the groove portion GV and in contact with at least a portion of the plating layer  600 . Here, the insulating material  700  may be extended to at least one of the first to fourth side surfaces  101  to  104  of the body, and is not limited thereto. In addition, each of the first and second external electrodes  501  and  502  may be extended to two side surfaces of the body  100 , opposing each other. 
     The insulating material  700  may cover five surfaces of the body except for the other surface opposing the one surface  100 A in the thickness direction, thus forming the coil component  10 A including a bottom electrode which is the electrode disposed only in one direction. 
     Descriptions of the other components are substantially the same as those described above, and detailed descriptions thereof are thus omitted. 
       FIG.  6    is a perspective view of still another coil component according to the present disclosure. 
     Referring to the drawing, a groove portion GV of a coil component  10 D according to still another exemplary embodiment of the present disclosure may include a third groove portion G 3  extended to the first and second side surfaces  101  and  102  of the body, adjacent to each other, and a fourth groove portion G 4  extended to the third and fourth side surfaces  103  and  104  of the body, adjacent to each other. Here, the third and fourth groove portions G 3  and G 4  may be spaced apart from each other, and are not limited thereto. In addition, the third and fourth groove portions G 3  and G 4  may each have a length in the thickness (T) direction shorter than a length of the body  100  in the thickness (T) direction. 
     The groove portion GV of the coil component  10 D according to the present disclosure may include the third groove portion G 3  formed in a region where the one surface  100 A of the body and the first and second side surfaces  101  and  102  of the body meet one another, and the fourth groove portion G 4  formed in a region where the one surface  100 A of the body and the third and fourth side surfaces  103  and  104  of the body meet one another. Here, the lead-out portion  200  may be formed close to the groove portion GV in the first and third side surfaces  101  and  103  of the body to be exposed from the third and fourth groove portions G 3  and G 4 , and is not limited thereto. 
     In addition, the groove portion GV may have the length shorter than the length of the body  100 , based on the thickness (T) direction of the coil component  10 D according to the present disclosure. That is, the groove portion GV may not entirely pass through the body in the thickness (T) direction, and is not limited thereto. 
     Here, the groove portion GV may be extended to each of two side surfaces adjacent to each other among the first to fourth side surfaces  101  to  104  of the body, and is not limited thereto. 
     In addition, the groove portion GV may become narrower toward the inside of the body  100 , and is not limited thereto. 
     The groove portion GV may have a tapered shape, and it is thus possible to reduce loss of the body  100  including a magnetic material described below, and to reduce occurrence of defective products by exposing the lead-out portion  200 . 
     Descriptions of the other components are substantially the same as those described above, and detailed descriptions thereof are thus omitted. 
     Manufacturing Method of Coil Component 
       FIGS.  7 A through  7 C  are views schematically illustrating a manufacturing method of a coil component according to the present disclosure. 
     As shown in  FIG.  7 A , first prepared is a coil bar which is formed by connecting a plurality of coils connected to each other and on which a magnetic sheet is stacked. Here shown is that the coil bar is disposed on a board  310 , and the present disclosure is not limited thereto. 
     The following is a specific method of preparing the coil bar. 
     A plurality of coil patterns  320  may be formed on an insulation board. The insulation board may not be particularly limited, may be formed of at least one of a copper clad laminate, a prepreg (PPG), an Ajinomoto build-up film (ABF) and a photo imagable dielectric (PID) for example, and may have a thickness of 20 to 100 μm. 
     The coil pattern  320  may be formed by using, for example, an electroplating method, and is not limited thereto. The coil pattern  320  may be formed of a metal having excellent electrical conductivity, for example, silver (Ag), palladium (Pd), aluminum (Al), nickel (Ni), titanium (Ti), gold (Au), copper (Cu), platinum (Pt) or an alloy thereof. 
     A via may be formed by forming a via hole in a portion of the insulation board and then filling the via hole with a conductive material, and may electrically connect the coil patterns  320  respectively formed on one surface and the other surface of the insulation board to each other. 
     The coil pattern  320  may be connected to the lead-out portion  200  exposed to each of first and third side surfaces  101  and  103  of a body  100  after being diced. Respective both ends of adjacent coil patterns  320  in a state of the coil bar before being diced may be physically and electrically connected to each other. 
     A portion where the coil pattern  320  is not formed may then be removed from the insulation board. 
     The corresponding portion may be removed from the insulation board by using mechanical drilling, laser drilling, sand blasting, punching processing or the like, and may be removed by using a carbon dioxide (CO 2 ) laser drill for example. 
     A through-hole passing through the insulation board may be formed by removing a central region of the insulation board, where the coil pattern  320  is not formed. 
     Here, it is possible not to remove a portion of the insulation board, where the coil portion  300  is not formed, and to remove only the rest, to form a connection portion. 
     Conventionally removed are all regions of the insulation board except for the region where the coil portion  300  is formed. However, in this exemplary embodiment of the present disclosure, it is possible not to remove one region of the board, where the coil pattern  320  is not formed, to form the connection portion, thereby increasing a force to support the coil pattern  320 , which may minimize deformation of the coil pattern  320  when stacking and compressing the magnetic composite sheet. 
     An insulating layer  400  covering the coil pattern  320  may be formed on a surface of the coil pattern  320 . The insulating layer  400  may be formed by using a method such as a screen printing method, a spray application process, a vacuum dipping process, a vapor deposition method (CVD) or a film lamination method, and is not limited thereto. 
     In addition, although not shown, the coil pattern  320  may be a wound coil covered by an insulating film and formed by a winding method. Here, the coil pattern  320  may be formed by forming a mold portion instead of the insulation board, and the insulation board may be removed after forming the wound coil pattern by using the insulation board, and is not limited thereto. Here, a method of forming the wound coil pattern may be the same as a known method. 
     Next, the body  100  may be formed by stacking a magnetic sheet  20  on the insulation board. 
     The body  100  may be formed by stacking the magnetic sheet  20  on each of two sides of the insulation board and compressing the same by using a lamination method or a hydrostatic press method. 
     The magnetic sheet  20  may be formed by molding a magnetic material-resin composite in a sheet shape, and may be compressed in a semi-cured state. The magnetic material-resin composite may be a mixture of magnetic metal powder particles and a resin mixture. Here, the magnetic metal powder particles may mainly include iron (Fe), chromium (Cr) or silicon (Si), and the resin mixture may include epoxy, polyimide, liquid crystal polymer (LCP) or a mixture thereof, and are not limited thereto. An empty space in a space  111  processed by the compression of the first magnetic sheet  20  may be filled with a magnetic material such as the magnetic material-resin composite. When a curing process is performed as a subsequent process, it is possible to prevent a coil  120  disposed at a predetermined position from being misaligned and to control deformation of the bar caused by movement of the sheet. 
     Here, a core portion  300  may be formed when at least a portion of the magnetic sheet  20  fills the through-hole formed in the central region of the insulation board. 
     In addition, referring to  FIG.  7 B , at least one groove portion GV may be disposed in one surface of the magnetic sheet  20  to correspond to an individual coil component in the coil bar on each of the upper and lower portion of which the magnetic sheet  20  is stacked. Here, the groove portion GV may be formed at a point where a plurality of routing lines intersect each other among routing lines  30  of the coil bar described below. 
     In more detail, the groove portion GV formed in one surface of the magnetic sheet  20  may be disposed at an intersection of the routing lines  30 , and may be formed in four individual coil components. In addition, the groove portion GV may be embedded in the body  100  to expose at least a portion of the lead-out portion  200 , and have a diameter smaller from the one surface of the magnetic sheet  20  in a thickness (T) direction. 
     The groove portion GV may be formed in the four individual coil components and have the tapered shape before being diced, and it is thus possible to reduce loss of the body  100  including the magnetic material, and to reduce occurrence of defective products by exposing the lead-out portion  200 . 
     Finally referring to  FIG.  7 C , diced are the insulation board and the magnetic sheet stacked on each of the two sides thereof along a boundary between the plurality of processed spaces, i.e., routing line  30 . The dicing may be performed based on a size designed in advance, and as a result, an individual coil component  10  may be provided. The individual coil components  10  may be provided when the dicing is performed using a dicing equipment or another dicing method such as a blade or a laser. 
     Meanwhile, the individual coil component  10  may not include the insulation board and/or a fixing frame (not shown) after the dicing is performed when the insulation board and/or the fixing frame (not shown) is designed to be smaller than a region (i.e., dicing-kerf region) that is cut off by a width of the dicing blade or the like. That is, the insulation board and/or the fixing frame (not shown) are provided for stably seating the coil, and may thus remain or may not remain in the final coil component. However, in order to improve accuracy in fixedly positioning the coil portion  300 , some portions of the insulation board and/or the fixing frame (not shown) may remain in the coil portion  300  when the insulation board is significantly close to the coil portion  300 . 
     Although not shown in the drawings, a polishing process may be performed to polish corners of the individual coil component  10  after the dicing process. The body  100  of the coil component  10  may be made into a round shape by the polishing process, and conventionally, an insulating material may be additionally printed on a surface of the body  100  to prevent its plating. The insulating layer formed here may include at least one of a glass-based material including silicon (Si), an insulating resin and plasma. 
     Next, the body  100  may be formed in a shape similar or identical to a hexahedral shape by applying a plating layer  600  and an insulating material  700  to the individual coil component  10 . Here, the plating layer  600  may be in contact with at least a portion of the lead-out portion  200  exposed to the groove portion GV. 
     In addition, the coil component  10  according to the present disclosure may be formed by including first and second external electrodes  501  and  502  disposed on one surface  100 A of the body, while being spaced apart from each other, and in contact with at least a portion of the plating layer  600 , and the present disclosure is not limited thereto. 
     Descriptions of the other components are substantially the same as those described above, and detailed descriptions thereof are thus omitted. 
     In the present specification, an expression that a component is disposed on another component is not intended to set a direction. Accordingly, the expression that the component is disposed on another component may indicate that the component is disposed on an upper side of another component, or disposed on a lower side of another component. 
     In the present specification, terms such as an upper surface, a lower surface, an upper side, a lower side, an uppermost side, a lowermost side and the like indicate directions set based on the drawings for convenience of description. Therefore, depending on the set directions, the upper surface, the lower surface, the upper side, the lower side, the uppermost side, the lowest side and the like may be described with different terms. 
     A meaning that a component is connected to another component herein conceptually includes not only a direct connection between two components but also their indirect connection through a third component. In addition, a term “electrically connected” conceptually includes a physical connection and a physical disconnection. 
     In the present specification, terms such as “first” and “second” are used to distinguish one component from another component, and do not limit a sequence, importance and the like of the corresponding components. In some cases, a first component may be named a second component and a second component may also be similarly named a first component, without departing from the scope of the present disclosure. 
     The term “an exemplary embodiment” used herein does not refer to the same exemplary embodiment, and is provided to emphasize a particular feature different from that of another exemplary embodiment. However, exemplary embodiments provided herein may be implemented by being combined in whole or in part one with one another. For example, one element described in a particular exemplary embodiment may be understood as a description related to another exemplary embodiment even if it is not described in another exemplary embodiment, unless an opposite or contradictory description is provided therein. 
     Terms used herein are used only in order to describe an exemplary embodiment rather than limiting the present disclosure. In this case, singular forms include plural forms unless interpreted otherwise in context. 
     As set forth above, according to the exemplary embodiments of the present disclosure, it is possible to provide the coil component which may be mounted on the board including the microcircuit pattern. 
     According to the exemplary embodiments of the present disclosure, it is also possible to provide the coil component including the coil with the less loss of the magnetic metal. 
     While exemplary embodiments have been shown and described above, it will be apparent to those skilled in the art that modifications and variations could be made without departing from the scope of the present disclosure as defined by the appended claims.