Patent Publication Number: US-10319610-B2

Title: Package carrier

Description:
CROSS-REFERENCE TO RELATED APPLICATION 
     This application is a divisional application of and claims the priority benefit of U.S. application Ser. No. 15/000,034, filed on Jan. 19, 2016, now allowed, which claims the priority benefit of Taiwan application serial no. 104130526, filed on Sep. 16, 2015. The entirety of each of the above-mentioned patent applications is hereby incorporated by reference herein and made a part of specification. 
    
    
     BACKGROUND OF THE INVENTION 
     Field of the Invention 
     The present invention relates to a carrier structure, and particularly relates to a package carrier. 
     Description of Related Art 
     In general, the package carrier is mainly constructed by multiple patterned conductive layers and at least one insulation layer, wherein the insulation layer is disposed between two adjacent patterned conductive layers to achieve the insulation effect. In order to enhance the heat dissipation effect, a heat dissipation block is usually fixed to the lower surface of the package carrier via an adhesive layer, such that the heat generated by the electronic elements on the package carrier can transfer through the patterned conductive layer and the insulation layer to the heat dissipation block so as to perform thermal conductivity. Because the adhesive layer and the insulation layer generally have a poor thermal conductivity, the thermal resistance is increased when the heat generated by the electronic elements transfers through the insulation layer and the adhesive layer to the heat dissipation block, so as to result in poor heat dissipation. In addition, using the heat dissipation block fixed to the package carrier also increase the thickness of the package carrier so that the light and thin requirements for current products are unable to be fulfilled. 
     SUMMARY OF THE INVENTION 
     The invention provides a package carrier, which is adapted to carry at least one heat generating element. 
     The invention also provides a manufacturing method of the package carrier, which is adapted to manufacture the above-mentioned package carrier. 
     The package carrier of the invention includes a substrate, at least one heat conducting element, an insulating material, a first patterned circuit layer, and a second patterned circuit layer. The substrate has an upper surface and a lower surface opposite to each other, and a through hole connecting the upper surface and the lower surface. The heat conducting element is disposed inside the through hole and has a first surface and a second surface opposite to each other. The thickness of the heat conducting element is smaller than the thickness of the substrate. The insulating material is located between the heat conducting element and the inner wall of the through hole, and the heat conducting element is fixed in the through hole by the insulating material. The insulating material has a top surface and a bottom surface opposite to each other. The top surface of the insulating material and the upper surface of the substrate are approximately coplanar. The bottom surface of the insulating material, the lower surface of the substrate, and the second surface of the heat conducting element are approximately coplanar. The insulating material and the heat conducting element define at least one cavity extending from the top surface of the insulating material to the heat conducting element, and the cavity exposes a portion of the first surface of the heat conducting element. The first patterned circuit layer is disposed on the upper surface of the substrate and the top surface of the insulating material, and exposes portions of the substrate and the top surface. The second patterned circuit layer is disposed on the lower surface of the substrate and the bottom surface of the insulating material, and exposes portions of the substrate and the bottom surface. 
     In one embodiment of the invention, materials of the heat conducting element include ceramic, silicon, silicon carbide, diamond, metal, or a lamination layer formed by a combination thereof. 
     In one embodiment of the invention, the heat conducting element includes a first metal layer, a second metal layer, and a heat conducting material layer. The heat conducting material layer is disposed between the first metal layer and the second metal layer, and the first metal layer and the second metal layer have the first surface and the second surface respectively. 
     In one embodiment of the invention, the package carrier further includes a first solder mask layer and a second solder mask layer. The first solder mask layer is at least disposed on a portion of the first patterned circuit layer and the substrate exposed by the first patterned circuit layer. The second solder mask layer is at least disposed on the substrate exposed by the second patterned circuit layer. 
     In one embodiment of the invention, the package carrier further includes a first surface treatment layer and a second surface treatment layer. The first surface treatment layer is at least disposed on the first patterned circuit layer. The second surface treatment layer is disposed on the second patterned circuit layer. 
     In one embodiment of the invention, the first patterned circuit layer is further disposed on the inner wall of the cavity and the first surface of the heat conducting element exposed by the cavity. 
     In one embodiment of the invention, the first surface treatment layer is further disposed on the first surface of the heat conducting element exposed by the cavity. 
     In one embodiment of the invention, the at least one heat conducting element includes a first heat conducting element and a second heat conducting element. The at least one cavity includes a first cavity and a second cavity. The first cavity exposes a portion of the first heat conducting element and the second cavity exposes a portion of the second heat conducting element. The thickness of the first heat conducting element is smaller than the thickness of the second heat conducting element, and the depth of the first cavity is greater than the depth of the second cavity. 
     The invention provides the manufacturing method of the package carrier, which includes following steps. Providing a substrate, wherein the substrate has an upper surface and a lower surface opposite to each other, and a through hole connecting the upper surface and the lower surface. Disposing at least one heat conducting element inside the through hole of the substrate, wherein the thickness of the heat conducting element is smaller than the thickness of the substrate. The heat conducting element is fixed in the through hole by an insulating material, and the insulating material is located between the heat conducting element and the inner wall of the through hole. The insulating material has a top surface and a bottom surface opposite to each other, the heat conducting element has a first surface and a second surface opposite to each other, the top surface of the insulating material and the upper surface of the substrate are approximately coplanar, and the bottom surface of the insulating material, the lower surface of the substrate, and the second surface of the heat conducting element are approximately coplanar. Forming a first patterned circuit layer and a second patterned circuit layer. The first patterned circuit layer is at least formed on the upper surface of the substrate and the top surface of the insulating material and exposes portions of the substrate and the top surface. The second patterned circuit layer is formed on the lower surface of the substrate and the bottom surface of the insulating material and exposes portions of the substrate and the bottom surface. Forming at least one cavity extending from the top surface of the insulating material to the heat conducting element, wherein the cavity exposes a portion of the first surface of the heat conducting element. 
     In one embodiment of the invention, steps for disposing the heat conducting element inside the through hole of the substrate comprise: providing an adhesive layer on the lower surface of the substrate, wherein the adhesive layer and the through hole of the substrate define an accommodating space; disposing the heat conducting element on the adhesive layer and inside the accommodating space; filling the accommodating space with the insulating material to encapsulate the heat conducting element and to fix the heat conducting element in the through hole; and removing the adhesive layer to expose the lower surface of the substrate and the bottom surface of the insulating material. 
     In one embodiment of the invention, steps for forming the first patterned circuit layer and the second patterned circuit layer comprise: forming a first circuit layer and a second circuit layer, wherein the first circuit layer is formed on the upper surface of the substrate and the top surface of the insulating material, and the second circuit layer is formed on the lower surface of the substrate and the bottom surface of the insulating material; and patterning the first circuit layer and the second circuit layer to form the first patterned circuit layer and the second patterned circuit layer. 
     In one embodiment of the invention, steps after forming the cavity extending from the top surface of the insulating material to the heat conducting element further comprise: forming a first solder mask layer, wherein the first solder mask layer is at least disposed on a portion of the first patterned circuit layer and the substrate exposed by the first patterned circuit layer; and forming a second solder mask layer, wherein the second solder mask layer is at least disposed on the substrate exposed by the second patterned circuit layer. 
     In one embodiment of the invention, steps after forming the cavity extending from the top surface of the insulating material to the heat conducting element further comprise: forming a first surface treatment layer, wherein the first surface treatment layer is at least disposed on the first patterned circuit layer; and forming a second surface treatment layer, wherein the second surface treatment layer is disposed on the second patterned circuit layer. 
     In one embodiment of the invention, the first patterned circuit layer is further disposed on the inner wall of the cavity and the first surface of the heat conducting element exposed by the cavity. 
     In one embodiment of the invention, the first surface treatment layer is further disposed on the first surface of the heat conducting element exposed by the cavity. 
     In one embodiment of the invention, materials of the heat conducting element include ceramic, silicon, silicon carbide, diamond, metal, or a lamination layer formed by a combination thereof. 
     In one embodiment of the invention, the heat conducting element includes a first metal layer, a second metal layer, and a heat conducting material layer. The heat conducting material layer is disposed between the first metal layer and the second metal layer, and the first metal layer and the second metal layer have the first surface and the second surface respectively. 
     In one embodiment of the invention, the at least one heat conducting element includes a first heat conducting element and a second heat conducting element. The at least one cavity includes a first cavity and a second cavity. The first cavity exposes a portion of the first heat conducting element and the second cavity exposes a portion of the second heat conducting element. The thickness of the first heat conducting element is smaller than the thickness of the second heat conducting element, and the depth of the first cavity is greater than the depth of the second cavity. 
     Based on the above, the heat conducting element of the package carrier of the invention is fixed in the through hole of the substrate by the insulating material, and the cavity of the insulating material exposes a portion of the first surface of the heat conducting element. Therefore, subsequently, when the package carrier carries a heat generating element, the heat generating element can be disposed in the cavity of the insulating material, can directly contact the heat conducting element, and can electrically connect with the first surface treatment layer by the wire. As a result, in the package carrier of the invention, except that the heat generated by the heat conducting element can effectively transfer to the external environment, the wiring path is also shortened effectively, so as to reduce the thickness of the package structure. 
     In order to make the aforementioned and other features and advantages of the invention more comprehensible, embodiments accompanying figures are described in detail below. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification. The drawings illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention. 
         FIG. 1A  to  FIG. 1G  are cross-sectional schematic views depicting a manufacturing method of a package carrier of one embodiment of the invention. 
         FIG. 2  is a cross-sectional schematic view depicting a package carrier of one embodiment of the invention. 
         FIG. 3  is a cross-sectional schematic view depicting a package carrier of one embodiment of the invention. 
         FIG. 4  is a cross-sectional schematic view depicting the package carrier in  FIG. 1G  carrying a heat generating element. 
         FIG. 5  is a cross-sectional schematic view depicting the package carrier in  FIG. 2  carrying a heat generating element. 
         FIG. 6  depicts a package carrier carrying two heat generating elements according to one embodiment of the invention. 
     
    
    
     DESCRIPTION OF THE EMBODIMENTS 
       FIG. 1A  to  FIG. 1G  are cross-sectional schematic views depicting a manufacturing method of a package carrier of one embodiment of the invention. According to the manufacturing method of the package carrier in the present embodiment, firstly, referring to  FIG. 1A , providing a substrate  110 , wherein the substrate  110  has an upper surface  111  and a lower surface  113  opposite to each other. The substrate  110  of the present embodiment can be, for example, a single layer circuit board, a double layer circuit board, or a multi-layer circuit board. Herein, as shown in  FIG. 1A , the substrate  110  is a double layer circuit board which is constructed by a dielectric layer  112  and circuit layers  114 ,  116  located at two opposite sides of the dielectric layer  112 , but the invention is not limited thereto. 
     Subsequently, referring to  FIG. 1B , a through hole H connecting the upper surface  111  and the lower surface  113  is formed in the substrate  110  by punching, routing, mechanical drilling, laser drilling, or other appropriate methods. 
     Subsequently, referring to  FIG. 1C , providing an adhesive layer  115  on the lower surface  113  of the substrate  110 , wherein the adhesive layer  115  and the through hole H of the substrate  110  define an accommodating space S. It should be noted here, the adhesive layer  115  is only adhered to the lower surface  113  of the substrate  110  temporarily to serve as a supporting element for a subsequent heat conducting element  120 . Subsequently, the heat conducting element  120  is disposed on the adhesive layer  115  and located inside the accommodating space S, wherein the thickness of the heat conducting element  120  is smaller than the thickness of the substrate  110 , the thickness of the heat conducting element  120  is, for example, from one tenth to nine-tenths of the thickness of the substrate  110 , and will not be limited thereto. The heat conducting element  120  has a first surface  122  and a second surface  124  opposite to each other, and the second surface  124  directly contacts the adhesive layer  115 . Herein, materials of the heat conducting element  120  include ceramic, silicon, silicon carbide, diamond, metal, or a lamination layer formed by a combination thereof. 
     Subsequently, referring to  FIG. 1C , an insulating material  130  fills the accommodating space S so as to encapsulate the heat conducting element  120  and to fix the heat conducting element  120  in the through hole H of the substrate  110 , wherein the insulating material  130  has a top surface  132  and a bottom surface  134  opposite to each other. At this time, as shown in  FIG. 1C , the heat conducting element  120  is fixed in the through hole H of the substrate  110  by the insulating material  130 , and the insulating material  130  is located between the heat conducting element  120  and the inner wall of the through hole H. In other words, the insulating material  130  is used to fix the relative position between the heat conducting element  120  and the substrate  110 . 
     Subsequently, referring to  FIG. 1C  and  FIG. 1D  simultaneously, removing the adhesive layer  115  to expose the lower surface  113  of the substrate  110  and the bottom surface  134  of the insulating material  130 . At this time, the top surface  132  of the insulating material  130  and the upper surface  111  of the substrate  110  are approximately coplanar, and the bottom surface  134  of the insulating material  130 , the lower surface  113  of the substrate  110 , and the second surface  124  of the heat conducting element  120  are approximately coplanar, it means a package carrier  100   a  which is subsequently formed (referring to  FIG. 1G ) can have a better surface flatness. At this point, steps for disposing the heat conducting element  120  inside the through hole H of the substrate  110  are completed. 
     Subsequently, referring to  FIG. 1D , framing a first circuit layer  140 ′ and a second circuit layer  150 ′, wherein the first circuit layer  140 ′ is formed on the upper surface  111  of the substrate  110  and the top surface  132  of the insulating material  130 , and the second circuit layer  150 ′ is formed on the lower surface  113  of the substrate  110  and the bottom surface  134  of the insulating material  130 . Herein, the method to form the first circuit layer  140 ′ and the second circuit layer  150 ′ is, for example, electroplating method. 
     Next, referring to  FIG. 1E , patterning the first circuit layer  140 ′ and the second circuit layer  150 ′, so as to form a first patterned circuit layer  140  and a second patterned circuit layer  150 . At this time, the first patterned circuit layer  140  is formed on the upper surface  111  of the substrate  110  and the top surface  132  of the insulating material  130 , and exposes a portion of the dielectric layer  112  of the substrate  110  and a portion of the top surface  132  of the insulating material  130 . The second patterned circuit layer  150  is formed on the lower surface  113  of the substrate  110  and the bottom surface  134  of the insulating material  130 , and exposes a portion of the dielectric layer  112  of the substrate  110  and a portion of the bottom surface  134  of the insulating material  130 . 
     After that, referring to  FIG. 1F , the first patterned circuit layer  140  serving as a mask, forming at least one cavity C extending from the top surface  132  of the insulating material  130  to the heat conducting element  120 , wherein the cavity C exposes a portion of the first surface  122  of the heat conducting element  120 . Herein, the first patterned circuit layer  140  can serve as the mask to form the cavity C by laser ablation or routing method. In addition, after forming the cavity C, optionally forming a first solder mask layer  160  and a second solder mask layer  170 , wherein the first solder mask layer  160  is at least disposed on a portion of the first patterned circuit layer  140  and the dielectric layer  112 , which is exposed by the first patterned circuit layer  140 , of the substrate  110 , and the second solder mask layer  170  is at least disposed on the dielectric layer  112 , which is exposed by the second patterned circuit layer  150 , of the substrate  110 . 
     Finally, referring to  FIG. 1G , in order to maintain the structural properties of the exposed first patterned circuit layer  140  and the exposed second patterned circuit layer  150 , forming a first surface treatment layer  180  and a second surface treatment layer  190 , wherein the first surface treatment layer  180  is at least disposed on the first patterned circuit layer  140  exposed by the first solder mask layer  160 , and the second surface treatment layer  190  is disposed on the second patterned circuit layer  150 . Herein, the first surface treatment layer  180  is further disposed on the first surface  122 , which is exposed by the cavity C, of the heat conducting element  120 . The material of the first surface treatment layer  180  and the second surface treatment layer  190  in the present embodiment is, for example, nickel, palladium, gold, or alloys of the said materials, so as to prevent the first patterned circuit layer  140  and the second patterned circuit layer  150  from being oxidized or being subject to the external contamination. So far, the package carrier  100   a  is completely manufactured. 
     In above structure, referring to  FIG. 1G , the package carrier  100   a  of the present embodiment includes the substrate  110 , the heat conducting element  120 , the insulating material  130 , the first patterned circuit layer  140 , and the second patterned circuit layer  150 . The substrate  110  has the upper surface  111  and the lower surface  113  opposite to each other, and the through hole H connecting the upper surface  111  and the lower surface  113 . The heat conducting element  120  is disposed inside the through hole H and has a first surface  122  and a second surface  124  opposite to each other. The thickness of the heat conducting element  120  is smaller than the thickness of the substrate  110 . The insulating material  130  is located between the heat conducting element  120  and the inner wall of the through hole H, and the heat conducting element  120  is fixed in the through hole H by the insulating material  130 . The insulating material  130  has the top surface  132  and the bottom surface  134  opposite to each other. The top surface  132  of the insulating material  130  and the upper surface  111  of the substrate  110  are approximately coplanar. The bottom surface  134  of the insulating material  130 , the lower surface  113  of the substrate  110 , and the second surface  124  of the heat conducting element  120  are approximately coplanar. The insulating material  130  and the heat conducting element  120  define at least one cavity C extending from the top surface  132  of the insulating material  130  to the heat conducting element  120 , and the cavity C exposes a portion of the first surface  122  of the heat conducting element  120 . The first patterned circuit layer  140  is disposed on the upper surface  111  of the substrate  110  and the top surface  132  of the insulating material  130 , and exposes a portion of the dielectric layer  112  of the substrate  110  and a portion of the top surface  132  of the insulating material  130 . The second patterned circuit layer  150  is disposed on the lower surface  113  of the substrate  110  and the bottom surface  134  of the insulating material  130 , and exposes a portion of the dielectric layer  112  of the substrate  110  and a portion of the bottom surface  134  of the insulating material  130 . 
     In addition, the package carrier  100   a  of the present embodiment further includes the first solder mask layer  160  and the second solder mask layer  170 , wherein the first solder mask layer  160  is at least disposed on a portion of the first patterned circuit layer  140  and the dielectric layer  112 , which is exposed by the first patterned circuit layer  140 , of the substrate  110 , and the second solder mask layer  170  is at least disposed on the dielectric layer  112 , which is exposed by the second patterned circuit layer  150 , of the substrate  110 . Otherwise, in order to maintain the structural properties of the exposed first patterned circuit layer  140  and the exposed second patterned circuit layer  150 , the package carrier  100   a  of the present embodiment further includes the first surface treatment layer  180  and the second surface treatment layer  190 , wherein the first surface treatment layer  180  is disposed on the first patterned circuit layer  140  exposed by the first solder mask layer  160 , and the second surface treatment layer  190  is disposed on the second patterned circuit layer  150 . 
     The heat conducting element  120  of the package carrier  100   a  of the present embodiment is fixed in the through hole H of the substrate  110  by the insulating material  130 , and the cavity C of the insulating material  130  exposes a portion of the first surface  122  of the heat conducting element  120 . Therefore, referring to  FIG. 4 , subsequently, when the package carrier  100   a  carries the heat generating element  210 , the heat generating element  210  can be disposed in the cavity C of the insulating material  130 , can directly contact the first surface treatment layer  180  located on the first surface  122  of the heat conducting element  120 , and can electrically connect with the first surface treatment layer  180  located on the first patterned circuit layer  140  by a plurality of wires  220 . In addition, the heat generating element  210 , the wire  220 , and the first solder mask layer  160  and the first surface treatment layer  180  of the package carrier  100   a  are encapsulated by a molding compound  230  so as to form a package structure  10 . As a result, in the package carrier  100   a  of the present embodiment, except that the heat generated by the heat conducting element  210  can effectively and rapidly transfer sequentially through the first surface treatment layer  180 , the heat conducting element  120 , the second patterned circuit layer  150 , and the second surface treatment layer  190  to the external environment, the wiring path of the wire  220  is also shortened effectively because of the configurational position of the heat conducting element  210 , so as to effectively reduce the thickness of the package structure  10  that is formed. 
     It should be noted here, the present embodiment is not limited to the forming sequence of the cavity C of the insulating material  130 , the first patterned circuit layer  140 , and the second patterned circuit layer  150 . In the above-mentioned embodiment, although the cavity C of the insulating material  130  is formed after the first patterned circuit layer  140  and the second patterned circuit layer  150 , in another embodiment, referring to  FIG. 2 , the cavity C of the insulating material  130  of the package carrier  100   b  can also be formed before the first patterned circuit layer  140   a  and the second patterned circuit layer  150   a , and therefore the first patterned circuit layer  140   a  is further disposed on the inner wall of the cavity C and the first surface  122  of the heat conducting element  120  exposed by the cavity C. In addition, the first surface treatment layer  180   a  that is subsequently formed can further disposed on the first patterned circuit layer  140   a  on the first surface  122  of the heat conducting element  120  exposed by the cavity C. In other words, at least the first patterned circuit layer  140   a  and the first surface treatment layer  180   a  located on the first patterned circuit layer  140   a  are disposed on the cavity C of the insulating material  130 . 
     Referring to  FIG. 5 , subsequently, when the package carrier  100   b  carries the heat generating element  210 , the heat generating element  210  can be disposed in the cavity C of the insulating material  130 , can directly contact the first surface treatment layer  180   a , and can electrically connect with the first surface treatment layer  180   a  located on the first patterned circuit layer  140   a  by the wire  220 . In addition, the heat generating element  210 , the wire  220 , and the first solder mask layer  160  and the first surface treatment layer  180   a  of the package carrier  100   b  are encapsulated by the molding compound  230  so as to form a package structure  20 . As a result, in the package carrier  100   b  of the present embodiment, except that the heat generated by the heat conducting element  210  can effectively and rapidly transfer sequentially through the first surface treatment layer  180   a , the first patterned circuit layer  140   a , the heat conducting element  120 , the second patterned circuit layer  150 , and the second surface treatment layer  190  to the external environment, the wiring path of the wire  220  is also shortened effectively because of the configurational position of the heat conducting element  210 , so as to effectively reduce the thickness of the package structure  20  that is formed. 
     In addition, the present embodiment is also not limited to the structure type of the heat conducting element  120 . In above-mentioned embodiment, although the heat conducting element  120  is embodied as a block structure having arc-shaped corners so as to increase the adhesion force between the heat conducting element  120  and the insulating material  130 , but in another embodiment, referring to  FIG. 3 , the heat conducting element  120   a  of the package carrier  100   c  in the present embodiment can also be formed by a first metal layer  121 , a second metal layer  123 , and a heat conducting material layer  125 , wherein the heat conducting material layer  125  is disposed between the first metal layer  121  and the second metal layer  123 , and the first metal layer  121  and the second metal layer  123  have the first surface  122  and the second surface  124  respectively. Herein, materials of the heat conducting material layer  125  include ceramic, silicon, silicon carbide, diamond, etc., the ceramic material is, for example, alumina, aluminum nitride, etc., but the invention is not be limited thereto. 
     In addition, it should be noted here, the invention is not limited to the quantity of cavity C of the insulating material  130 , and to the quantity of each of the heat conducting elements  120 ,  120   a  disposed in the package carriers  100   a ,  100   b ,  100   c . In above-mentioned embodiment, the quantity of the cavity C of the insulating material  130  is one, and the quantity of each of the heat conducting elements  120 ,  120   a  disposed in the package carriers  100   a ,  100   b ,  100   c  is also one. However, in other embodiments, referring to  FIG. 6 , the package carrier  100   d  of the present embodiment has two heat conducting elements, namely a first heat conducting element  120   b  and a second heat conducting element  120   c , and the insulating material  130 ′ has a first cavity C 1  and a second cavity C 2 . The first cavity C 1  exposes a portion of the first heat conducting element  120   b  and the second cavity C 2  exposes a portion of the second heat conducting element  120   c . The thickness T 1  of the first heat conducting element  120   b  is smaller than the thickness T 2  of the second heat conducting element  120   c , and the depth D 1  of the first cavity C 1  is greater than the depth D 2  of the second cavity C 2 . Because the insulating material  130 ′ of the present embodiment has the first cavity C 1  and the second cavity C 2 , the package carrier  100   d  is adapted to carry two heat generating elements  210   a ,  210   b.    
     Referring to  FIG. 6 , subsequently, when the package carrier  100   d  carries the heat generating elements  210   a ,  210   b , the heat generating elements  210   a ,  210   b  can be respectively disposed in the first cavity C 1  and the second cavity C 2  of the insulating material  130 ′, can directly contact the first surface treatment layer  180 , and can electrically connect with the first surface treatment layer  180  located on the first patterned circuit layer  140  on the upper surface  111  of the substrate  110  by the wire  220 . In addition, the heat generating elements  210   a ,  210   b , the wire  220 , and the first solder mask layer  160  and the first surface treatment layer  180  of the package carrier  100   d  are encapsulated by the molding compound  230  so as to form a package structure  30 . As a result, in the package carrier  100   d  of the present embodiment, except that the heat generated by the heat conducting elements  210   a ,  210   b  can effectively and rapidly transfer through the first surface treatment layer  180 , the first heat conducting element  120   b , the second heat conducting element  120   b , the second patterned circuit layer  150 , and the second surface treatment layer  190  to the external environment, the wiring path of the wire  220  is also shortened effectively because of the configurational position of the heat conducting elements  210   a ,  210   b , so as to simultaneously reduce the wiring cost and to effectively reduce the thickness of the package structure  30  that is formed. 
     In summary, the heat conducting element of the package carrier of the invention is fixed in the through hole of the substrate by the insulating material, and the cavity of the insulating material exposes a portion of the first surface of the heat conducting element. Therefore, subsequently, when the package carrier carries a heat generating element, the heat generating element can be disposed in the cavity of the insulating material, can directly contact the heat conducting element, and can electrically connect with the first surface treatment layer by the wire. As a result, in the package carrier of the invention, except that the heat generated by the heat conducting element can effectively transfer to the external environment, the wiring path is also shortened effectively, so as to reduce cost and to reduce the thickness of the package structure. 
     Although the present invention has been described with reference to the above embodiments, it will be apparent to one of the ordinary skill in the art that modifications to the described embodiments may be made without departing from the spirit of the invention. Accordingly, the scope of the invention is defined by the attached claims not by the above detailed descriptions.