Patent Publication Number: US-2005116325-A1

Title: Switching media for chip carrier device

Description:
FIELD OF THE INVENTION  
      The present invention relates to a switching media for chip carrier device, especially to the switching media that being capable of electrically connecting to any type of chip.  
     BACKGROUND OF THE INVENTION  
      Normally suitable package is put on a chip for integrated circuits for anti-pollution or protecting damage due to the fragile character of the chip, and the chip can be properly and electrically connected to a PCB, a carrying board or a lead frame for conducting current.  
      Please refer to  FIG. 1 , a packing structure for general integrated circuit chip comprises: a chip  11 , a packing colloid  12  and a lead frame for conducting current to outside, wherein the lead frame has a chip pad  16  and a plurality of legs  14 , wherein the chip  11  sticks on the chip pad  16  by way of viscose  13  as coagel, a plurality of leading wires  15  connect to both welding pad of the chip  11  and inner ends of the legs  14  inside the packing colloid  12 , outer ends of the legs  14  elongate out of the packing colloid  12  for touching with PCB.  
      However, chip  11 , legs  14  and leading wires  15  are as a certain type of assembly in packing colloid  12  after packing integrated circuits, and while the integrated circuits connect to a PCB, the PCB can only fix and use the chip  11 . In case of the chip  11  not working properly and being changed or upgraded, the PCB may then be damaged easily.  
     SUMMARY OF THE INVENTION  
      According to the disadvantage of changing integrated circuits in prior arts, the inventor has being developed a new technology of a switching media for chip carrier device depending on the experiences of manufacturing integrated circuits to improve the disadvantage in prior arts.  
      The primary objective of the present invention is to provide a switching media being capable of making any chip electrically connect to a chip carrier device, the switching media has a flexible board, the flexible board has circuits and a plurality of connecting points by way of etching thereon, the connecting points are able to connect to any type of chip of integrated circuit electrically, another plurality of etched connecting points on a lower surface of the flexible board are capable of connecting to the chip carrier device electrically, the circuits thereon individually connect to the connecting points on an upper surface of the flexible board and the connecting points on the lower surface. It is convenient for that the flexible board can electrically connect to the chip carrier device while the flexible board is installed on the chip carrier device. Hence, the upper surface is able to be mounted by any type of integrated circuit chip to reach the purposes of any chip connecting to the chip carrier device by means of the flexible board and any chip being changeable anytime.  
      Other and further features, advantages and benefits of the invention will become apparent in the following description taken in conjunction with the following drawings. It is to be understood that the foregoing general description and following detailed description are exemplary and explanatory but are not to be restrictive of the invention. The accompanying drawings are incorporated in and constitute a part of this application and, together with the description, serve to explain the principles of the invention in general terms. Like numerals refer to like parts throughout the disclosure. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS  
       FIG. 1  is a side view of a packing structure of a normal integrated circuit chip in prior arts;  
       FIG. 2  is a 3-D view of the present invention;  
       FIG. 3  is a side view of the present invention;  
       FIG. 4  is a first side view of a chip of the present invention;  
       FIG. 5  is a second side view of a chip of the present invention;  
       FIG. 6  is a third side view of a chip of the present invention;  
       FIG. 7  is a fourth side view of a chip of the present invention. 
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS  
      Please refer to  FIGS. 2 and 3 , the present invention is a switching media for chip carrier device, and the switching media comprises a flexible board  20  with an insulating film (the insulating film is a plastic film for the preferred embodiment, but not restricted for practical application), the flexible board  20  has circuits  21 , a plurality of etched connecting points  23  electrically connecting to at least one chip  40  (integrated circuit chip) are on an upper surface  22  of the flexible board  20 , and another plurality of etched connecting points  25  electrically connecting to a chip carrier device  30  are on a lower surface  24 , the circuits  21  individually connect to the connecting points  23  and the connecting points  25  so as to that the circuits  21 , the connecting points  23  and the connecting points  25  being related electrically.  
      Please again refer to  FIGS. 2 and 3 , the flexible board  20  can be put on a carrier base  31  inside the chip carrier device  30  for that the flexible board  20  connecting to the chip carrier device  30  electrically, such that, any or plural types of chips  40  (integrated circuit chip) can be installed on the upper surface  22  of the flexible board  20  so as to that any type of chip  40  being connected to the chip carrier device  30  by the flexible board  20 . Therefore, it is obvious that installing any or different type of chip is variable anytime.  
      Please refer to  FIG. 4 , the connecting points  23  can be designed based on legs (not shown in  FIG. 4 ) of a die  42 , such as external elongation mode  41  shown in  FIG. 5 , internal bending mode  51  shown in  FIG. 6  and soldering ball mode  61  shown in  FIG. 7 . Thus, the category of die modes may be increased as preferred embodiments mentioned above.  
      Back to  FIGS. 2 and 3 , the chip carrier device  30  comprises the opening carrier base  31  and a packing colloid  33 , wherein the carrier base  31  has an opening space for reserving different types of chips  40 , a plurality of connecting points  34  are set on a surface of the carrier base  31  corresponding to the connecting points  25  so as to that the flexible board  20  connecting to the chip carrier device  30  electrically during the flexible board  20  being installed on the carrier base  31 , inner ends of legs  32  are sealed in the packing colloid  33 , outer ends of the legs  32  are elongated externally to be as connecting points between the legs  32  and circuits of a PCB for electrical connection of the chip carrier device  30  and the PCB, further that, another electrical connection between the chip  40  and the PCB is successfully made.  
      Another preferred embodiment of the present invention is that to construct several containing rooms by way of folding the flexible board  20  or using plural flexible boards  20  directly at the moment of the flexible board  20  being mounted on the carrier base  31 , each containing room may then be able to reserve a chip for the electrical connection of the flexible board  20  and the chip carrier device  30 .  
      While the invention has been described by way of example and in terms of a preferred embodiment, it is to be understood that the invention is not limited thereto. To the contrary, it is intended to cover various modifications and similar arrangements and procedures, and the scope of the appended claims therefore should be accorded the broadest interpretation so as to encompass all such modifications and similar arrangements and procedures.