Abstract:
The invention provides a semiconductor light-emitting device package structure. The semiconductor light-emitting device package structure includes a substrate, N sub-mounts, and N semiconductor light-emitting die modules, wherein N is a positive integer lager than or equal to 1. Each of the sub-mounts is embedded on the substrate and exposed partially. Each of the semiconductor light-emitting die modules is mounted on the exposed surface of one of the sub-mounts.

Description:
BACKGROUND OF THE INVENTION 
       [0001]    1. Field of the Invention 
         [0002]    The present invention is related to a semiconductor light-emitting device package structure, and more particularly, to a multi-chip module single package structure for semiconductor light-emitting dies. 
         [0003]    2. Description of the Prior Art 
         [0004]    Because of the advantages of long life span, light weight, low power consumption, and absence of mercury, semiconductor light-emitting devices, such as light-emitting diode (LED), has become an ideal light source, and it has been greatly developed. LED can be applied in many fields, including information, communication, consumer electronics, vehicles, traffic light, billboard, and illumination market. 
         [0005]    However, current high power semiconductor light emitting devices face a problem of overheating after continued lighting for a period. Furthermore, current semiconductor light-emitting device package structures generally face the problem of exceeding heat resistance, which affects the power and efficiency of lighting. Therefore, conventional semiconductor light emitting device package structures can not reduce the temperature of the light emitting device by simply providing a heat sink. Accordingly, there is a need to provide a package structure with high heat dissipating efficiency to solve the problem of exceeding heat resistance between the interface of the package structure and the heat dissipating module. 
       SUMMARY OF THE INVENTION 
       [0006]    Accordingly, a scope of the invention is to provide a semiconductor light-emitting device package structure for semiconductor light-emitting dies to solve the problem of the prior art. 
         [0007]    In a preferred embodiment, a semiconductor light-emitting device package structure of the invention includes a substrate, a flat sub-mount, at least one semiconductor light-emitting die module, and a package material. The substrate thereon defines a top surface and a bottom surface, and a first recess is formed on the top surface, and a second recess is formed on the bottom surface. The second recess is passed through and linked together with the first recess. Furthermore, a protrusion is formed on the top surface along the edge of the first recess, and a plurality of outer electrodes are disposed on the top surface. The flat sub-mount is linked to the second recess and thereon defines a respective first surface and a respective second surface. The flat sub-mount is embedded in the second recess such that the first surface of the sub-mount is partially exposed within the first recess. Each of the at least one semiconductor light-emitting die includes a bottom portion and a inter electrode, the at least one semiconductor light-emitting die is mounted to the first surface of the sub-mount partially exposed within the first recess. Additionally, the package material is filled into the protrusion to cover the at least one semiconductor light-emitting die. 
         [0008]    The scope of the present invention will no doubt become obvious to those of ordinary skill in the art after reading the following detailed description of the preferred embodiment, which is illustrated in the various figures and drawings. 
     
    
     
       BRIEF DESCRIPTION OF THE APPENDED DRAWINGS 
         [0009]      FIG. 1  is a top view of a semiconductor light-emitting device package structure of an embodiment of the invention. 
           [0010]      FIG. 2  is a sectional view of a semiconductor light-emitting device package structure of an embodiment of the invention. 
           [0011]      FIG. 3  is a sectional view of a semiconductor light-emitting device package structure of an embodiment of the invention. 
           [0012]      FIG. 4  is a sectional view of a semiconductor light-emitting device package structure of an embodiment of the invention. 
       
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
       [0013]    The present invention is to provide a semiconductor light-emitting device package structure for semiconductor light-emitting dies. The preferred embodiments are disclosed as below. 
         [0014]    Please refer to  FIG. 1 , which shows a top view of a semiconductor light-emitting device package structure of an embodiment of the invention. In the embodiment, the semiconductor light-emitting device package structure  1  includes a substrate  11 , a sub-mount  12 , and at least one semiconductor light-emitting die  13 . The substrate has a top surface  111 , and a plurality of outer electrodes  17  are disposed on the top surface  111 . Furthermore, the sub-mount  12  has a first surface  121 , and the at least one semiconductor light-emitting die  13  is mounted to the first surface  121  of the sub-mount  12  via the inter electrode of its bottom surface  131 . 
         [0015]    Please refer to  FIG. 2 , which shows a sectional view of a semiconductor light-emitting device package structure of an embodiment of the invention. The semiconductor light-emitting device package structure  1  includes a substrate  11 , a sub-mount  12 , at least one semiconductor light-emitting die  13 , and a package material  14 . The top surface  111  of the substrate  11  has a first recess  1111 , and a bottom surface  112  is defined on the substrate  11 . Furthermore, a second recess  1121  is formed on the bottom surface  112  which is passed through and linked together with the first recess  1111 . The sub-mount  12  is embedded in the second recess  1121 , and a second surface  122  is defined on the sub-mount  12 , and the first surface  121  of the sub-mount  12  is exposed in the first recess  1111 , and a protrusion  16  is formed on the top surface  111  along the edge of the first recess  1111 . The at least one semiconductor light-emitting die  13  has a bottom  131  which mounted to the first surface  121  of the sub-mount  12  partially exposed within the first recess  1111 . The package material  14  is filled into the protrusion  16  to cover the at least one semiconductor light-emitting die  13 . Moreover, the at least one semiconductor light-emitting die  13  has inner electrodes which electrically coupled to the outer electrodes  17  on the top surface  111  via wires. In the embodiment, the inner electrodes of the at least one semiconductor light-emitting die  13  is connected to the outer electrodes  17  in series. However, the connection of the electrodes can be parallel connection to reach the goal of the invention. 
         [0016]    A heat conductive paste  15  is disposed between the first surface  121  of the sub-mount  12  and the bottom of the first recess  1111  to combine the first substrate  11  and the sub-mount  12 . 
         [0017]    Please refer to  FIG. 3 , which shows a sectional view of a semiconductor light-emitting device package structure of an embodiment of the invention. As shown in  FIG. 3 , the second surface  122  of the flat sub-mount  12  is parallel to the bottom surface  112  of the substrate  11 . Furthermore, the heat conductive paste  15  is coated under the second surface  122  of the flat sub-mount  12 , so as to allow the second surface  122  of the sub-mount  12  and the bottom surface  112  of the substrate  11  to constitute into a plane. 
         [0018]    Please refer to  FIG. 4 , which shows a sectional view of a semiconductor light-emitting device package structure of an embodiment of the invention. As shown in  FIG. 4 , the second surface  122  of the flat sub-mount  12  is parallel to the bottom surface  112  of the substrate  11 . Furthermore, an heat conductive paste  15  is coated under the bottom surface  112  of the substrate  11 , so as to allow the second surface  122  of the sub-mount  12  and the bottom surface  112  of the substrate  11  to constitute into a plane. 
         [0019]    Obviously, the invention provides a package structure with high heat dissipating efficiency, and the package structure is used to package at least a semiconductor light-emitting device. Furthermore, the package structure of the invention can also be used to coordinate with a heat conducting device to further eliminate the heat generated by a high power semiconductor light emitting device, so as to solve the problem of exceeding heat resistance between the interface of the package structure and the heat dissipating module. 
         [0020]    With the example and explanations above, the features and spirits of the invention will be hopefully well described. Those skilled in the art will readily observe that numerous modifications and alterations of the device may be made while retaining the teaching of the invention. Accordingly, the above disclosure should be construed as limited only by the metes and bounds of the appended claims.