Patent Publication Number: US-2006006310-A1

Title: Image sensor package structure

Description:
BACKGROUND OF THE INVENTION  
      1. Field of the invention  
      The invention relates to an image sensor package structure, and in particular to an image sensor can be reduced the manufacturing cost.  
      2. Description of the Related Art  
      Referring to  FIG. 1 , it is a conventional image sensor includes a substrate  10 , a frame layer  18 , a photosensitive chip  26 , a plurality of wires  28 , and a transparent layer  34 . The substrate  10  has a first surface  12  on which a plurality of signal input terminals  15  is formed, and a second surface  14  on which a plurality of signal output terminals  16  is formed. The signal input terminals  15  are electrically connected to signal output terminals  16  by wires  17 , which are located at the side of the substrate  10 . The frame layer  18  has an upper surface  20  and a lower surface  22  adhered to the first surface  12  of the substrate  10  to form a chamber  24  together with the substrate  10 . The photosensitive chip  26  is arranged within the chamber  24  and is mounted to the first surface  12  of the substrate  10 . Each wire  28  has a first terminal  30  and a second terminal  32 . The first terminals  30  are electrically connected to the photosensitive chip  26 , and the second terminals  32  are electrically connected to the signal input terminals  15  of the substrate  10 . The transparent layer  34  is adhered to the upper surface  20  of the frame layer  18 .  
      Referring to  FIG. 2 , it is a method for manufacturing the conventional image sensor. Firstly, providing a substrate  10 , which includes a plurality of region 13 , the periphery of the each region  13  is formed with plurality of via hole  15 , and a penetrated slot  17  is formed between the each region  13 , so that the via hole  15  is became half-circular. Providing a frame layer  18 , which is formed with penetrated hole  19 . The frame layer  18  is stacked on the substrate  10 . Therefore, cutting the frame layer  18  and substrate  10  according to penetrated hole  19  of the frame layer  18  to be single substrate.  
      In order to finish the above-mentioned package processes, the substrate  10  is sliced to form penetrate slot  17 , thus, the manufacturing process are complicated, and the cost of manufacture is high.  
     SUMMARY OF THE INVENTION  
      An object of the invention is to provide an image sensor package structure, wherein the processes for packaging an image sensor may be efficiently reduced, so as to may be reduced the cost of the manufacture.  
      To achieve the above-mentioned object, the invention provides a substrate, a frame layer, a photosensitive chip, wires and transparent layer. The substrate is formed with a plurality of via hole, and the each via hole is arranged at the periphery of the substrate, then an interval is formed between the periphery of the substrate and the via holes, a conductive material being filled into the each via hole. The frame layer is arranged on the upper surface of the substrate to form a cavity together with the substrate. The photosensitive chip arranged within the cavity and is mounted on the substrate. Each wire is electrically connected the photosensitive chip to the substrate. The transparent layer covered over the frame layer to cover the photosensitive chip. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS  
       FIG. 1  is a cross-sectional view showing a conventional image sensor package structure.  
       FIG. 2  is a schematic illustrated showing an conventional image sensor package.  
       FIG. 3  is a cross-sectional view an image sensor package structure of the present invention.  
       FIG. 4  is a schematic illustrated showing an image sensor package structure. 
    
    
     DETAILED DESCRIPTION OF THE INVENTION  
      Please refer to  FIG. 3 , an image sensor package structure of the present invention includes a substrate  40 , a frame layer  42 , a photosensitive chip  44 , wires  46 , and a transparent layer  48 .  
      The substrate  40  has an upper surface  50  and a lower surface  52  opposite to the upper surface  50 . A plurality of via hole  54  are penetrated from the upper surface  50  to the lower surface  52 , and the each via hole  54  is arranged at the periphery of the substrate  40 , then an interval is formed between the periphery of the substrate  40  and the via holes  54 . A conductive material  56  is filled into the each via hole  54 , so that the signal input terminals  58  of the upper surface  50  are electrically connected to the signal output terminals  60  through the conductive material  56 .  
      The frame layer  42  is arranged on the upper surface  50  of the substrate  40  to form a cavity  62  together with the substrate  40 . The frame layer  42  is injection molded with the substrate  40  to form the cavity  62 .  
      The photosensitive chip  44  is arranged within the cavity  62  and is mounted on the upper surface  50  of the substrate 40 .  
      The plurality of wires  46  are electrically connected the photosensitive chip  44  to the signal input terminals  58  of the substrate  40 .  
      The transparent layer  48  is covered over the frame layer  42  to cover the photosensitive chip  44 .  
      Therefore, please refer to  FIG. 4 , it is a method for manufacturing an image sensor package structure of the present invention. Firstly, providing a substrate  40 , which is formed with via hole  54 . Then, cutting the frame layer  42  and substrate  40  according to adjacent single substrate  40  to be single substrate  40 . Thus, the present invention that is easy to manufactured, so that it can be reduced the cost of the manufacture.  
      While the invention has been described by way of an example and in terms of a preferred embodiment, it is to be understood that the invention is not limited to the disclosed embodiment. On the contrary, it is intended to cover various modifications. Therefore, the scope of the appended claims should be accorded the broadest interpretation so as to encompass all such modifications.