Patent Publication Number: US-2015062854-A1

Title: Electronic component module and method of manufacturing the same

Description:
CROSS-REFERENCE TO RELATED APPLICATION 
     This application claims the benefit of Korean Patent Application No. 10-2013-0102356 filed on Aug. 28, 2013, with the Korean Intellectual Property Office, the disclosure of which is incorporated herein by reference. 
     BACKGROUND 
     The present disclosure relates to an electronic component module and a method of manufacturing the same, and more particularly, to an electronic component module in which electronic components are mounted on both surfaces of a substrate to increase integration density, and a method of manufacturing the same. 
     Recently, market demand for portable electronic devices has increased in the area of electronic products. Accordingly, the miniaturization and lightening of electronic components mounted in electronic devices is in continual demand. 
     In order to realize the miniaturization and lightening of electronic devices, a system on chip (SOC) technology of implementing a plurality of individual elements on a single chip, a system in package (SIP) technology in which a plurality of individual elements are integrated in a single package, or the like, as well as a technology of reducing individual sizes of mounting components may be required. 
     Meanwhile, in order to manufacture an electronic component module having a small size and high performance, a structure in which electronic components are mounted on both surfaces of a substrate has also been developed. 
     However, in the case of such an electronic component module in which electronic components are mounted on both surfaces of a substrate, it may be difficult to form an external connection terminal on the substrate. 
     That is, since electronic components are mounted on both surfaces of a substrate, space for forming an external connection terminal may not be accurately secured. Accordingly, a double-sided mounting type electronic component module allowing for the easy formation of an external connection terminal and a method of easily manufacturing the double-sided mounting type electronic component module are in demand. 
     RELATED ART DOCUMENT 
     (Patent Document 1) Korean Patent Laid-Open Publication No. 2013-0056570 
     SUMMARY 
     An aspect of the present disclosure may provide a double-sided mounting type electronic component module allowing for electronic components to be mounted on both surfaces of a substrate. 
     An aspect of the present disclosure may also provide a method of easily manufacturing a double-sided mounting type electronic component module. 
     According to an aspect of the present disclosure, an electronic component module may include a first substrate; a plurality of electronic components mounted on both surfaces of the first substrate; a second substrate bonded to a lower surface of the first substrate; and a molded part formed on the lower surface of the first substrate and having the second substrate embedded therein. 
     The electronic component module may further include a plurality of external connection terminals bonded to a lower surface of the second substrate and penetrating through the molded part to be exposed to the outside of the molded part. 
     The molded part may fill a gap formed between the lower surface of the first substrate and an upper surface of the second substrate. 
     The molded part may be formed on the lower surface of the first substrate, while embedding the electronic components mounted on a lower portion of the first substrate and the entirety of the second substrate therein. 
     The second substrate may include a through portion formed therein and may be bonded to the lower surface of the first substrate to accommodate the electronic components mounted on the lower surface of the first substrate in the through portion. 
     The second substrate may include a plurality of substrates spaced apart from each other and dispersedly disposed. 
     The second substrate may be formed to be smaller than the first substrate and may be disposed on a central portion of the first substrate, and the electronic components may be disposed outside of the second substrate. 
     The second substrate may include a substrate frame; and a plurality of metallic pins penetrating through and coupled to the substrate frame and having one ends bonded to the first substrate. 
     The other ends of the metallic pins may be exposed to the outside of the molded part. 
     The electronic component module may further include a plurality of external connection terminals bonded to the other ends of the metallic pins. 
     According to another aspect of the present disclosure, an electronic component module may include a first substrate; a plurality of electronic components mounted on both surfaces of the first substrate; a second substrate bonded to a lower surface of the first substrate; and a molded part formed on the both surfaces of the first substrate to encapsulate the electronic components and the second substrate. 
     The electronic component module may further include a plurality of external connection terminals bonded to a lower surface of the second substrate and penetrating through the molded part to be exposed to the outside of the molded part. 
     According to another aspect of the present disclosure, a method of manufacturing an electronic component module may include preparing a first substrate; mounting electronic components on an upper surface of the first substrate; forming a first molded part on the upper surface of the first substrate; mounting a plurality of second substrates and electronic components on a lower surface of the first substrate; and forming a second molded part to embed the second substrates therein. 
     The mounting of the plurality of second substrates may include applying a solder paste onto the lower surface of the first substrate; disposing the electronic components and the plurality of second substrates on the solder paste; and hardening the solder paste to fixedly bond the electronic components and the second substrates to the lower surface of the first substrate. 
     The method may further include forming external connection terminals on the second substrates after the forming of the second molded part. 
     The forming of the external connection terminals may include forming terminal holes in a lower surface of the second molded part; and forming the external connection terminals on the second substrates through the terminal holes. 
     The forming of the terminal holes may include forming the through holes in positions corresponding to electrode pads formed on the second substrates. 
     Each of the second substrates may include a through portion formed therein and may be bonded to the lower surface of the first substrate to accommodate the electronic components mounted on the lower surface of the first substrate in the through portion. 
     Each of the second substrates may include a plurality of substrates spaced apart from each other and dispersedly disposed. 
     The second substrates may be formed to be smaller than the first substrate and may be disposed on a central portion of the first substrate, and the electronic components may be disposed outside of the second substrates. 
     The second substrate may include a substrate frame; and a plurality of metallic pins penetrating through and coupled to the substrate frame and having one ends bonded to the first substrate. 
     The method may further include: after the forming of the second molded part, grinding a lower surface of the second molded part to expose the other ends of the metallic pins; and forming external connection terminals on the other ends of the metallic pins. 
    
    
     
       BRIEF DESCRIPTION OF DRAWINGS 
       The above and other aspects, features and other 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 schematic cross-sectional view of an electronic component module according to an exemplary embodiment of the present disclosure; 
         FIG. 2  is a partially cut-away perspective view illustrating an interior of the electronic component module illustrated in  FIG. 1 ; 
         FIG. 3  is an exploded perspective view of the electronic component module illustrated in  FIG. 1 ; 
         FIGS. 4A to 41  are cross-sectional views illustrating a method of manufacturing an electronic component module according to an exemplary embodiment of the present disclosure; 
         FIG. 5  is a schematic cross-sectional view of an electronic component module according to another exemplary embodiment of the present disclosure; 
         FIG. 6  is a schematic cross-sectional view of an electronic component module according to another exemplary embodiment of the present disclosure; and 
         FIG. 7  is a schematic cross-sectional view of an electronic component module according to another exemplary embodiment of the present disclosure. 
     
    
    
     DETAILED DESCRIPTION 
     Hereinafter, exemplary embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. The disclosure may, however, be embodied in many different forms and should not be construed as being limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. In the drawings, the shapes and dimensions of elements may be exaggerated for clarity, and the same reference numerals will be used throughout to designate the same or like elements. 
       FIG. 1  is a schematic cross-sectional view of an electronic component module  100  according to an exemplary embodiment of the present disclosure.  FIG. 2  is a partially cut-away perspective view illustrating an interior of the electronic component module  100  illustrated in  FIG. 1 .  FIG. 3  is an exploded perspective view of the electronic component module  100  illustrated in  FIG. 1 . 
     Referring to  FIGS. 1 to 3 , the electronic component module  100  according to the exemplary embodiment may include electronic components  1 , a first substrate  10 , a second substrate  20 , and molded parts  30 . 
     The electronic components  1  may include various components such as passive components  1   a  and an active component  1   b , and all types of components may be used as the electronic components  1 , as long as they may be mounted on the substrate. 
     The electronic components  1  may be mounted on both upper and lower surfaces of the first substrate  10  to be described below.  FIG. 1  illustrates an example in which both of the active component  1   b  and the passive component  1   a  are mounted on the upper surface of the first substrate  10  and only the passive components  1   a  are mounted on the lower surface of the first substrate  10 . However, exemplary embodiments of the present disclosure are not limited thereto. Alternatively, the electronic components  1  may be arranged on both surfaces of the first substrate  10  in various manners according to sizes or shapes of the electronic components  1 , and the design of the electronic component module  100 . 
     At least one electronic component  1  may be mounted on each of the upper and lower surfaces of the first substrate  10 . As the first substrate  10 , various kinds of substrates well known in the art, (a ceramic substrate, a printed circuit board, a flexible substrate, and the like for example), may be used. In addition, mounting electrodes  13  for mounting the electronic components  1  may be formed on the both surfaces of the first substrate  10 , or although not illustrated, wiring patterns for electrically connecting the mounting electrodes  13  to each other may be formed on the both surfaces of the first substrate  10 . 
     The first substrate  10  according to the exemplary embodiment may be a multilayer substrate including a plurality of layers, and circuit patterns  15  for forming electrical connections may be formed between the respective layers. 
     In addition, the first substrate  10  according to the exemplary embodiment of the present disclosure may include conductive vias  14  for forming electrical connections between the mounting electrodes  13  formed on the both surfaces of the first substrate  10  and the circuit patterns  15  formed in the first substrate  10 . 
     In addition, the first substrate  10  according to the exemplary embodiment may include cavities (not shown) formed therein to accommodate the electronic components  1 . 
     The first substrate  10  according to the exemplary embodiment may include external connection pads  16  formed on the lower surface thereof. The external connection pads  16  may be electrically connected to the second substrate  20  to be described below and may be connected to external connection terminals  28  through the second substrate  20 . 
     Thus, the external connection pads  16  may be formed on positions of the lower surface of the first substrate  10 , facing an upper surface of the second substrate  20  when the second substrate  20  is coupled to the first substrate  10 . As necessary, a plurality of external connection pads may be arranged in various manners. 
     The second substrate  20  is disposed on a lower portion of the first substrate  10  and is coupled to the first substrate  10 . 
     The second substrate  20  may be formed of a single substrate or a plurality of substrates. According to the exemplary embodiment, the second substrate  20  may be configured of a single substrate and have a through portion  22  formed therein, the through portion  22  having a through hole shape. 
     The through portion  22  may be used as a space for accommodating the electronic components  1  mounted on the lower surface of the first substrate  10 . Thus, the electronic components  1  mounted on the lower surface of the first substrate  10  may be mounted only on a portion of the lower surface of the first substrate  10 , facing the through portion  22  of the second substrate  20 . 
     However, the configuration of the present disclosure is not limited thereto. 
     Similarly to the case of the first substrate  10 , various types of substrates, such as a ceramic substrate, a printed circuit board (PCB), a flexible substrate, or the like, well known in the art to which the present disclosure pertains may be used as the second substrate  20 . 
     The second substrate  20  may be formed by preparing a plurality of insulating layers including vias formed therein and then stacking the insulating layers to electrically connect the vias to each other, or alternatively, may be formed by stacking a plurality of insulating layers, forming a through hole penetrating through the insulating layers, and then, forming a via in the through hole. In addition, the second substrate  20  may be formed in various manners, and for example, may be formed by preparing one resin layer (e.g., an epoxy layer or the like) and forming a plurality of metallic posts (e.g., a copper (Cu) post) through the resin layer to be embedded therein. 
     Electrode pads  24  may be formed on both surfaces of the second substrate  20 . The electrode pads  24  formed on the upper surface of the second substrate  20  may be used to be electrically connected to the external connection pads  16  of the first substrate  10 . In addition, the electrode pads  24  formed on the lower surface of the second substrate  20  may be used for coupling with the external connection terminals  28 . Although not illustrated, wiring patterns for electrically connecting the electrode pads  24  to each other may be formed on the both surfaces of the second substrate  20 . 
     The second substrate  20  according to the exemplary embodiment may be a multilayer substrate including a plurality of layers, and circuit patterns (not shown) for forming electrical connections may be formed between the respective layers. 
     The second substrate  20  may include the electrode pads  24  formed on the both surfaces thereof and conductive vias  25  electrically connecting the circuit patterns formed in the second substrate  20 . 
     In addition, the second substrate  20  according to the exemplary embodiment may have a thickness greater than a mounting thickness of the electronic components  1  mounted on the lower surface of the first substrate  10  in order to stably protect the electronic components  1  mounted in the through portion  22 . However, exemplary embodiments of the present disclosure are not limited thereto. 
     The external connection terminals  28  may be formed on the lower surface of the second substrate  20 . The external connection terminals  28  may be used to electrically and physically connect the electronic component module  100  to a main substrate (not shown) on which the electronic component module  100  is mounted. 
     The external connection terminals  28  may be formed on the electrode pads  24  formed on the lower surface of the second substrate  20 . The external connection terminals  28  may be formed in the form of bumps. However, embodiments of the present disclosure are not limited thereto. For example, the external connection terminals  28  may be formed in various manners such as in the form of solder balls, or the like. 
     The external connection terminals  28  are electrically connected to the electrode pads  24  formed on the upper surface of the second substrate  20  through the conductive vias  25 . Thus, when the second substrate  20  is coupled to the first substrate  10 , the first substrate  10  may be electrically connected to the external connection terminals  28  through the second substrate  20 . 
     In addition, the external connection terminals  28  may be mounted on the second substrate  20  through terminal holes  36  of a second molded part  35  that will be described later. Thus, a height (vertical length) of the external connection terminals  28  may be formed to be greater than a thickness of the second molded part  35  formed on a lower portion of the second substrate  20 . 
     The second substrate  20  according to the exemplary embodiment may be formed to be smaller than the first substrate  10 . That is, a width of the second substrate  20  may be smaller than that of the first substrate  10 . Such a structure may be conceived to easily manufacture the electronic component module  100 , which will be described in more detail with regard to a manufacturing method to be described below. 
     The molded parts  30  may include a first molded part  31  formed on the upper surface of the first substrate  10  and the second molded part  35  formed on the lower surface of the first substrate  10 . 
     The first molded part  31  may encapsulate the electronic components  1  mounted on the upper surface of the first substrate  10 . 
     The first molded part  31  may be disposed between the electronic components  1  mounted on the first substrate  10 , thereby preventing electrical short circuits between the electronic components  1 . In addition, the molded parts  30  may enclose external portions of the electronic components  1  and fix the electronic components  1  onto the substrate, thereby securely protecting the electronic components  1  from external impacts. 
     The first molded part  31  may be formed of an insulating material including a resin material such as epoxy, or the like. In addition, the first molded part  31  according to the exemplary embodiment may be formed by accommodating the first substrate  10  including the electronic components  1  mounted thereon in a mold (not shown) and subsequently, injecting molding resin into the mold. However, embodiments of the present disclosure are not limited thereto. 
     The second molded part  35  may be formed in an inner portion of the through portion  22  of the second substrate  20  and outside of the second substrate  20 . Here, the second molded part  35  may be formed to cover the entirety of the second substrate  20  such that the second substrate  20  is embedded therein. However, embodiments of the present disclosure are not limited thereto. That is, the second substrate  20  may be formed to be partially exposed to the outside. 
     The second molded part  35  according to the exemplary embodiment may be disposed to fill the entirety of the inner portion of the through portion  22 . Thus, all of the electronic components  1  accommodated in the through portion  22  may be embedded in the second molded part  35 . However, as necessary, a portion of the electronic components  1  may be exposed outside of the second molded part  35 . 
     The second molded part  35  according to the exemplary embodiment may include the terminal holes  36 . The terminal holes  36  may be holes for mounting the external connection terminals  28  on the lower surface of the second substrate  20 . Accordingly, a plurality of the terminal holes  36  may be formed to correspond to the electrode pads  24  formed on the lower surface of the second substrate  20  and may have a predetermined size in order to enable the external connection terminals  28  to be easily mounted on the electrode pads  24  of the second substrate  20 . 
     The second molded part  35  may be formed by a molding method for injecting molding resin, in a similar manner to that of the first molded part  31 . That is, the second molded part  35  may be formed by disposing the first substrate  10  having the lower surface thereof on which the electronic components  1  and the second substrate  20  are mounted, in a mold (not shown) and subsequently, injecting molding resin into the mold. However, embodiments of the present disclosure are not limited thereto. 
     In the electronic component module  100  according to the exemplary embodiment configured as described above, the electronic components  1  may be mounted on the both surfaces of the first substrate  10 . In addition, the external connection terminals  28  are formed on the second substrate  20  disposed on the lower surface of the first substrate  10 . 
     Thus, a plurality of the electronic components  1  may be mounted on a single substrate (that is, the first substrate  10 ), thereby increasing integration density. In addition, the external connection terminals  28  for the first substrate  10  on which the electronic components  1  are mounted may be formed using the second substrate  20  provided as a separate substrate, and thus, the formation of the external connection terminals  28  may be facilitated. 
     Even in a case in which the electronic components  1  are mounted on the both surfaces of the first substrate  10 , the electronic component module  100  according to the exemplary embodiment may be entirely encapsulated by the first and second molded parts  30 . Thus, even in a case in which the second substrate  20  or the electronic components  1  are separated from the first substrate  10  due to heat generated at the time of mounting the electronic component module  100  on another main substrate, movements of the electronic component module  100  may be fixed by the molded parts  30 . 
     Thus, bonding reliability between the electronic components and the substrate may be enhanced. 
     Hereinafter, a method of manufacturing an electronic component module according to an exemplary embodiment will be described below. 
       FIGS. 4A to 41  are cross-sectional views illustrating a method of manufacturing an electronic component module according to an exemplary embodiment of the present disclosure. 
     First, as illustrated in  FIG. 4A , the first substrate  10  is prepared. As described above, the first substrate  10  may be a multilayer substrate. The mounting electrodes  13  may be formed on both surfaces of the first substrate  10 . In addition, the external connection pads  16  may be formed on the lower surface of the first substrate  10 . 
     In particular, the first substrate  10  prepared in the process may be a substrate on which a plurality of identical mounting regions A are repeatedly arranged. The first substrate  10  may be a quadrangular substrate having a wide area or an elongated strip shaped substrate. 
     The first substrate  10  may be formed to simultaneously manufacture a plurality of individual modules. In this regard, the plurality of individual module mounting regions A are separately formed on the first substrate  10 , and electronic component modules may be manufactured in the plurality of individual module mounting regions A. 
     Then, as illustrated in  FIG. 4B , the electronic components  1  are mounted on one surface, that is, the upper surface of the first substrate  10 . The operation of mounting the electronic components  1  may be performed by printing a solder paste on the mounting electrodes  13  formed on one surface of the first substrate  10  using a screen printing method, or the like, disposing the electronic components  1  on the printed solder paste, and then, applying heat to the solder paste to harden the solder paste. 
     In this case, the identical electronic components  1  may be mounted on the respective module mounting regions A in the same arrangement manner. 
     Then, as illustrated in  FIG. 4C , the first molded part  31  may be formed on one surface of the first substrate  10  to encapsulate the electronic components  1 . In the present operation, as described above, the first molded part  31  may be formed by disposing the first substrate  10  including the electronic components  1  mounted thereon in a mold (not shown) and then injecting molding resin into the mold. As the first molded part  31  is formed, the electronic components  1  mounted on one surface, that is, the upper surface of the first substrate  10  may be protected from the outside by the first molded part  31 . 
     The first molded part  31  according to the exemplary embodiment may be formed in an integrated type to cover all the plurality of individual module mounting regions A on the first substrate  10 . However, embodiments of the present disclosure are not limited thereto. As necessary, the first molded part  31  may be divided and formed independently on each of the individual module mounting regions A. 
     Then, as illustrated in  FIG. 4D , a solder paste P is printed on the other surface, that is, the lower surface of the first substrate  10  on which the first molded part  31  is formed. In this case, the solder paste P is printed on the external connection pads  16  as well as on the mounting electrodes  13 . 
     Then, as illustrated in  FIG. 4E , the electronic components  1  and the second substrate  20  are mounted on the other surface of the first substrate  10  on which the solder paste P is printed. 
     The mounting operation may be performed by disposing the electronic components  1  on the mounting electrodes  13  and disposing the second substrate  20  on the external connection pads  16 . The disposition operation may be performed by disposing the electronic components  1  and subsequently, disposing the second substrate  20 . However, embodiments of the present disclosure are not limited thereto. That is, the second substrate  20  may be disposed first. Alternatively, the second substrate  20  and the electronic components  1  may be simultaneously disposed, for example. The disposition operation may be performed in various manners. 
     The second substrate  20  according to the exemplary embodiment may be configured of a plurality of substrates that are separately attached to the respective separate module mounting regions A, rather than a single substrate having the plurality of individual module mounting regions A in a similar manner to the first substrate  10 . 
     That is, the second substrate  20  may include a plurality of substrates having the same shape as one another, and the plurality of substrates may be repeatedly arranged in the respective separate module mounting regions A of the first substrate  10 . In this case, the substrates adjacent to each other in the second substrate  20  may be mounted on the first substrate  10  to be spaced apart from each other at a predetermined interval S. 
     When the electronic components  1  and the second substrate  20  are disposed on the other surface of the first substrate  10 , heat is applied to harden the solder paste P (refer to  FIG. 4D ). Through this process, the solder paste P is melted and hardened to form a solder connection portion  80 , and the electronic components  1  and the plurality of substrates of the second substrate  20  disposed on the lower surface of the first substrate  10  may be stably fixed to the first substrate  10  by the solder connection portion  80  to thereby be electrically and physically connected to the first substrate  10 . 
     Then, as illustrated in  FIG. 4F , the second molded part  35  is formed on the lower surface of the first substrate  10 . In the operation, in a similar manner to the case of the first molded part  31 , the second molded part  35  may be formed by disposing the first substrate  10  on which the electronic components  1  and the second substrate  20  are mounted in a mold and subsequently injecting molding resin into the mold. 
     Due to the presence of the second molded part  35 , the electronic components  1  and the second substrate  20  mounted on the lower surface of the first substrate  10  may be embedded in the second molded part  35 . 
     In the operation, the molding resin injected into the mold may also fill a gap formed between the first substrate  10  and the second substrate  20 . That is, the second molded part  35  may be formed in the gap between the first substrate  10  and the second substrate  20 . 
     In this case, the first substrate  10  and the second substrate  20  may have insulation therebetween by the second molded part  35  disposed therebetween and may also obtain coupling force between the first substrate  10  and the second substrate  20 . 
     In addition, the second molded part  35  according to the exemplary embodiment may be separately and independently formed in the respective separate module mounting regions A. However, embodiments of the present disclosure are not limited thereto. That is, similar to the first molded part  31 , the second molded part  35  may be formed in an integrated manner to cover all of the plurality of individual module mounting regions A. 
     Then, as illustrated in  FIG. 4G , the terminal holes  36  are formed in the second molded part  35 . As described above, the terminal holes  36  are provided to form the external connection terminals  28  on the second substrate  20 . Thus, the terminal holes  36  may be formed to correspond to the electrode pads  24  of the second substrate  20 . 
     The terminal holes  36  may be formed by laser drilling, but are not limited thereto. 
     Then, as illustrated in  FIG. 4H , the external connection terminals  28  are formed on the lower surface of the second substrate  20 . The external connection terminals  28  may be formed on the electrode pads  24  formed on the lower surface of the second substrate  20  in the form of bumps. However, embodiments of the present disclosure are not limited thereto. That is, the external connection terminals  28  may be formed in various manners such as in the form of solder balls, or the like. 
     In addition, the external connection terminals  28  may be formed on the second substrate  20  through the terminal holes  36  of the second molded part  35 . Thus, the external connection terminals  28  may be disposed in the terminal holes  36  of the second molded part  35  and may partially protrude outside of the second molded part  35 . 
     Finally, as illustrated in  FIG. 4I , the first substrate  10  on which the molded parts  30  are formed may be cut to form individual electronic component modules  100 . 
     In the operation, the first substrate  10  on which the molded parts  30  are formed may be cut using a blade  70  along a boundary between the individual module mounting regions A (refer to  FIG. 4H ). 
     In the electronic component module  100  according to the exemplary embodiment, the boundary between the individual module mounting regions A may correspond to a space between second molded parts  35  spaced apart from each other. Thus, cutting along the boundary between the individual module mounting regions A have the same meaning as cutting along the space between the spaced second molded parts  35 . 
     Accordingly, in the method of manufacturing an electronic component module according to an exemplary embodiment of the present disclosure, since the cutting operation may be performed along the space between the second molded parts  35  using the blade  70 , only the first molded part  31  and the first substrate  10  may be simply cut to separate electronic component modules  100  from each other. 
     Thus, compared with a case in which the second substrate  20  and the second molded part  35  are simultaneously cut, a cutting process may be facilitated and time for the cutting operation may be significantly reduced. 
     In the electronic component module  100  manufactured through the above described operations according to the exemplary embodiment, the second substrate  20  and the electronic components  1  (in particular, the electronic components mounted on the lower surface of the first substrate  10 ) may be simultaneously mounted, rather than coupling the first substrate  10  and the second substrate  20  to each other and subsequently, mounting the electronic components  1  on the substrate. That is, the electronic components  1  and the second substrate  20  are simultaneously mounted on the lower surface of the first substrate  10 , and then, are hardened to be fixedly coupled to each other. 
     Accordingly, compared with a method in which the electronic components  1  and the second substrate  20  are separately bonded to the first substrate  10 , the number of manufacturing processes may be reduced to allow for ease of manufacturing. 
     In addition, in the manufacturing method according to the exemplary embodiment, as the first substrate  10 , a single substrate on which the plurality of individual module mounting regions A are divided may be used. As the second substrate  20 , a plurality of substrates respectively disposed on the plurality of individual module mounting regions may be used. 
     Thus, in the cutting process, only the first molded part  31  and the first substrate  10  may be cut to separate the individual electronic component modules  100 . Thus, the electronic component modules  100  may be easily manufactured and time required for manufacturing the same may be significantly reduced. 
     An electronic component module according to the present disclosure is not limited to the foregoing embodiments and various applications thereof may be enabled. 
       FIG. 5  is a schematic cross-sectional view of an electronic component module  200  according to another embodiment of the present disclosure. 
     Referring to  FIG. 5 , in the electronic component module  200  according to the exemplary embodiment, the second substrate  20  may be configured of a plurality of substrates, rather than a single substrate. The plurality of respective substrates may be spaced apart from each other and may be dispersedly disposed. In addition, the plurality of substrates may be consecutively arranged. 
     Here, the plurality of substrates of the second substrate  20  may be disposed in gaps between the electronic components  1  mounted on the lower surface of the first substrate  10  or spaces around the electronic components  1 . 
     In addition, the plurality of substrates of the second substrate  20  may be molded to have the same shape as each other in order to facilitate the manufacturing thereof, but may be formed to different shapes as necessary. 
     When the plurality of substrates of the second substrate  20  are dispersedly disposed, the electronic components  1  may be mounted in various manners and the external connection terminals  28  may be effectively disposed. 
       FIG. 6  is a schematic cross-sectional view of an electronic component module  300  according to another embodiment of the present disclosure. 
     Referring to  FIG. 6 , in the electronic component module  300  according to the exemplary embodiment, the second substrate  20  has a smaller area than that of the first substrate  10  and is disposed on a central portion of the first substrate  10 . In addition, electronic components are dispersedly disposed and mounted outside of the second substrate  20 . 
     In a case in which the electronic component module  300  is configured as described above, the number of the external connection terminals  28  may be significantly reduced and the number of the electronic components  1  mounted on the lower portion of the first substrate  10  may be significantly reduced. 
       FIG. 7  is a schematic cross-sectional view of the electronic component module  400  according to another embodiment of the present disclosure. 
     Referring to  FIG. 7 , the electronic component module  400  according to the exemplary embodiment is configured in such a manner that the second substrate  20  may include a substrate frame  26  and metallic pins  27 . 
     Here, the substrate frame  26  may be formed to have a quadrangular shape similar to the second substrate  20  shown in  FIG. 3  and may have a smaller thickness than the second substrate  20 . 
     A plurality of through holes may be formed in the substrate frame  26 , and the metallic pins  27  are inserted through the through holes. 
     The metallic pins  27  may be formed to have a length corresponding to the thickness of the second molded part  35 . The metallic pins  27  are inserted into and coupled to the substrate frame  26 , such that one ends of the metallic pins  27  may be bonded to the external connection pads  16  of the first substrate  10 . In addition, the other ends of the metallic pins  27  are exposed to the outside of the second molded part  35 , and the external connection terminals  28  are formed on the exposed ends. 
     The second substrate  20  configured as described above according to the exemplary embodiment may be manufactured by preparing the substrate frame  26  in which through holes are formed and coupling the metallic pins  27  into the through holes of the substrate frame  26 . Thus, the electronic component module  400  may be very easily manufactured. 
     When only the metallic pins  27  are mounted on the first substrate  10  without the substrate frame  26  and then the second molded part  35  is formed, the metallic pins  27  may be easily separated from the first substrate  10  due to the liquidity of molding rein. That is, the metallic pins  27  alone are bonded to the first substrate  10  and thus may be easily separated by external force. 
     However, the second substrate  20  according to the exemplary embodiment is formed in such a manner that a plurality of metallic pins  27  are integrally formed using the substrate frame  26 . Accordingly, during a manufacturing process, the plurality of metallic pins  27  may be simultaneously mounted on the first substrate  10 , and thus, the electronic component module  400  may be easily manufactured. 
     Since the plurality of metallic pins  27  are bonded to the first substrate  10  to increase adhesion between the plurality of metallic pins  27  and the first substrate  10 , the second substrate  20  may be stably bonded to the first substrate  10 . Thus, while the second molded part  35  is formed, the second molded part  35  may not be easily separated from the first substrate  10  due to the liquidity of molding rein. 
     The electronic component module  400  according to the exemplary embodiment may be manufactured by the same method as that of the foregoing embodiment. However, embodiments of the present disclosure are not limited thereto. A method for forming the external connection terminals  28  may be modified. 
     For example, in the electronic component module  400  according to the exemplary embodiment, the second molded part  35  is formed, an external surface of the second molded part  35 , that is, a bottom surface of the electronic component module  100 , that is, a lower surface of the second molded part  35  may be ground to completely expose the other ends of the metallic pins  27  outwardly, and then, the external connection terminals  28  are formed on the metallic pins  27 . In this case, compared with the foregoing embodiment, the thickness of the electronic component module  100  may be reduced. 
     In the exemplary embodiment, the second substrate may be formed as an integrated substrate having a quadrangular type. However, embodiments of the present disclosure are not limited thereto. That is, the second substrate  20  may be modified in various manners similar to the second substrate described with reference to  FIG. 5  or  6 . 
     As set forth above, in the electronic component module according to the embodiments of the present disclosure, electronic components are mounted on both surfaces of the first substrate. In addition, external connection terminals may be formed on the second substrate disposed on the lower surface of the first substrate. 
     Thus, a plurality of electronic components may be mounted on a single substrate (that is, the first substrate), thereby increasing integration density. In addition, the external connection terminals for the first substrate on which the electronic components are mounted may be formed using the second substrate provided as a separate substrate, and thus, the formation of external connection terminals may be facilitated. 
     In the electronic component module according to the embodiments of the present disclosure, even in a case in which electronic components are mounted on both surfaces of the first substrate, the electronic components may be encapsulated by the first and second molded parts. Thus, even in a case in which the second substrate or the electronic components are separated from the first substrate due to heat generated at the time of mounting the electronic component module on another main substrate, movements of the electronic component module may be fixed by the molded parts. 
     Accordingly, bonding reliability between electronic components and a substrate may be enhanced. 
     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 spirit and scope of the present disclosure as defined by the appended claims.