Patent Publication Number: US-2006008939-A1

Title: Image sensor package

Description:
BACKGROUND OF THE INVENTION  
      1. Field of the invention  
      The invention relates to an image sensor package, and in particular to an image sensor is capable of increasing the reliability of the product.  
      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 first electrodes  15  are formed, and a second surface  14  on which a plurality of second electrodes  16  are formed. The first electrodes  15  are corresponding to electrically connect to the second electrodes  16  by the conductive wires  17 , which are located at the side of the substrate. 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 first electrodes  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 top view of the substrate of the  FIG. 1 . The each electrode  15  of the substrate  10  is arranged in straight line, and a green paint  35  is coated between the each first electrode  15 . The frame layer  18  is mounted on the green paint  35 . Therefore, The wet-air from the atmosphere air will enter the internal of the product through the gap between the green paint  35  and first electrode  15 , so that the reliability of the product may be reduced.  
     SUMMARY OF THE INVENTION  
      An object of the invention is to provide an image sensor package, it can prevent the wet-air from the atmosphere air to inter the internal of the product. So as to, may be enhanced the reliability of the product  
      To achieve the above-mentioned object, the invention provides a substrate, a frame layer, a photosensitive chip, wires and transparent layer. The substrate has an upper surface on which first electrodes are formed, and a lower surface on which second electrodes are formed, wherein the each first electrode is curved. The frame layer is arranged on the upper surface of the substrate to form a cavity together with the substrate. The photosensitive chip is arranged within the cavity and is mounted on the upper surface of the substrate. The plurality of wires are electrically connected the photosensitive chip to the first electrode of the substrate. The transparent layer is 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.  
       FIG. 2  is a top-view showing an conventional image sensor package.  
       FIG. 3  is a cross-sectional view showing an image sensor package of the present invention.  
       FIG. 4  is a top-view showing a substrate of image sensor package of the present invention  
       FIG. 5  is a top-view showing an image sensor package of the present invention 
    
    
     DETAILED DESCRIPTION OF THE INVENTION  
      Please refer to  FIG. 3 ,  FIG. 4 , and  FIG. 5 , it is an image sensor package 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  on which first electrodes  54  are formed, and a lower surface  52  on which second electrodes  56  are formed. The first electrodes  54  are corresponding to electrically connect to the second electrode  56 , wherein the each first electrode  54  is curved, in the embodiment, the each first electrode  54  is S-shape. A green-paint  58  is coated between the each first electrode  54  of the substrate  40 .  
      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 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 first electrode  54  of the substrate  40 .  
      The transparent layer  48  is covered over the frame layer  42  to cover the photosensitive chip  44 .  
      Therefore, the first electrodes man prevent the wet-air to enter the internal of the product, thus, the reliability of the product may be enhanced.  
      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.