Patent Publication Number: US-2005139525-A1

Title: Chip sorting apparatus and method for fabricating the same

Description:
FIELD OF THE INVENTION  
      The present invention is to provide a chip sorting apparatus and the method for fabricating the same. More particularly, it is applicable to the chip pick-up sorting process. By using the chip sorting apparatus and the method for fabricating the same of the present invention, it can fast implement the chip inspection without multiple chip re-movements. Further, it can avoid multiple positions before the chip inspection.  
     BACKGROUND OF THE INFORMATION  
      In the conventional chip sorting inspection process, it picks up the chip from the wafer and places it to a supporting plate. Then, it picks up the chip in order from the supporting plate and places them to a testing platform. Please referring to  FIG. 1 , it is a prior art showing the flow chart of the chip pick-up inspection. First, it picks the chip up  20  from the wafer  10 , and places it to a supporting plate  30 . Then, it uses a pick-up method to pick up the chip  20  from the supporting plate  30  for processing the inspection in the testing platform. However, the chip has to pass through multiple movements before testing. The chip, therefore, has to be performed for positioning before testing. It has to process positioning in both Y direction  41  and X direction  42 . More, it has to pass through at least a three-pin position in the positioning process for further inspection.  
      According to the above description, the present invention is to provide a chip sorting apparatus and a method for fabricating the same. It uses a positioning axis to process directly the chip sorting inspection on the wafer. More, it does not require multiple chip re-movements as well as not require multiple positions to achieve the chip inspection. The positioning axis leads to a fast position while picking up the chip. It can avoid the complicated processes of multiple chip positions causing from multiple pick-ups. Further, it can enhance the chip pick-up efficiency.  
     SUMMARY OF THE INVENTION  
      It is an object of the present invention is to provide a chip sorting method. More particularly, it is applicable to the chip pick-up sorting process. By using the chip sorting method to directly inspect the chip in the chip pick-up process, it does not require multiple chip re-movements and can implement the chip inspection. The chip sorting method mainly uses a direct inspection on the chip of the wafer. More particularly, it uses a positioning axis to remove the chip from wafer and to process the inspection. More, it does not require multiple chip pick-ups and repeat positions thereto enhance the chip pick-up efficiency.  
      It is another object of the present invention is to provide a chip sorting apparatus. More particularly, it is applicable to the chip pick-up process. By using the chip sorting apparatus, it can directly inspect the chip in the chip pick-up process. It does not require multiple chip re-movements, and can implement the chip inspection. The chip sorting apparatus mainly comprises two chip pick-up platforms and one positioning axis. It directly processes the chip inspection on the wafer, then, it does not require removing the chip from the wafer and then processes the inspection. Therefore, it can decrease multiple pick-ups and repeat positions for the chip thereto enhance the chip sorting efficiency.  
      For a more complete understanding of the present invention and for further advantages thereof, reference is now made to the following description taken in conjunction with the accompanying drawing, in which: 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS  
       FIG. 1  is a prior art showing the flow chart of the chip pick-up inspection;  
       FIG. 2  is a preferred embodiment of the present invention showing a chip sorting apparatus;  
       FIG. 3  is a preferred embodiment of the present invention showing a chip sorting process; and  
       FIG. 4  is a preferred embodiment of the present invention showing the flow chart of the chip sorting method. 
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS  
      The present invention is to provide a chip sorting apparatus and the method thereof. More particularly, it is applicable to the chip pick-up sorting process. By using the chip sorting method to directly inspect the chip in the chip pick-up process, it does not require multiple chip re-movements and can implement the chip inspection.  
      Please referring to  FIG. 2 , it is a preferred embodiment of the present invention showing a chip sorting apparatus. The chip sorting apparatus comprises a first platform  60 , which provides a place for the wafer. The wafer  10  comprises at least a chip  21 . A positioning axis  61  is also included, which is positioned under the first platform  60 , and comprises a withstand-end  611  with lift and down functions. A first robotic arm  70  is included, which has a probe  71 . The withstand-end  611  can withstand the chip  21  by lift and down. It uses the probe to process the electricity test for testing the chip  21 . It follows the test of the probe  71 , and places the chip to the pre-sorting specialized bin of the second platform. Apart from this, while the wafer  10  comprises at least two more chips  20 , the wafer  10  is placed in the first platform  60 . The wafer is pre-cut for dividing the chip  20 , and processes the chipping on the blue film  11  of the chip.  
      Please referring to  FIG. 3 , it is a preferred embodiment of the present invention showing a chip sorting process. The chip sorting apparatus further comprises a second robotic arm  80  and a second platform  90 . The second robotic arm  80  having a sucking mechanism  81  sucks the chip  21  and places it to the specialized bin of the second platform  90 . The specialized bin more can be used for sorting different kinds of chips.  
      Furthermore, the present invention is to provide a chip sorting method. Please referring to  FIG. 4 , it is one of the preferred embodiments in the present invention showing the flow chart of a chip sorting method. The chip sorting method can be described as the followings. First, a wafer is positioned on the first platform  51 . The wafer at least is covered with a chip and a blue film. While the wafer has at least two chips, it processes the wafer division and blue film chipping for dividing the chip. Further, a positioning axis of the platform is lifted to withstand the chip  52 . Then, it uses the probe of the first robotic arm to test the chip  53 . The test can include an electricity test of the chip inspection. Finally, it uses a second robotic arm to suck the chip and places it to the second platform  54 . The second platform at least comprises a specialized bin, and the specialized bin is for pre-sorting. Other objects, features, and advantages of the present invention will become more fully apparent from the following detailed description of the preferred embodiments, the appended claims, and the accompanying drawings.  
      While the invention has been described in terms of what are presently considered to be the most practical and preferred embodiments, it is to be understood that the invention need not be limited to the disclosed embodiment. On the contrary, it is intended to cover various modifications and similar arrangements included within the spirit and scope of the appended claims while which are to be accord with the broadest interpretation so as to encompass all such modifications and similar structures.