Abstract:
The present invention provides a chip assembly structure with a cover, comprising: a socket having four sidewalls to form a room for placing a chip and comprising a plurality of contact ends corresponding to the contacts of the chip to be placed, wherein each contact ends penetrates said socket to form an exposing solder terminal; and a cover having at least a flexible part against on the chip when the chip is positioned in the room.

Description:
[0001]     The present application is a continue-in-part application of the application filed previously on Oct. 7, 2004, application Ser. No. 10/959,168, “chip assembly structure and socket”. 
     
    
     BACKGROUND OF THE PRESENT INVENTION  
       [0002]     1. Field of Invention  
         [0003]     The present invention relates to a chip assembly structure, more particularly to a chip assembly structure with a cover.  
         [0004]     2. Description of Related Arts  
         [0005]     Referring to  FIG. 1 , a chip assembly structure includes a chip  1  having multiple contacts  11  in multiple rows, for example, two rows, on its bottom surface, and a socket  2  having a concave on its one side for accommodating the chip  1  and multiple contact ends  21  corresponding to the multiple contacts  11 , wherein each contact end  21  penetrates the socket and extends out from it (referring to  FIG. 2 ) to form a exposing solder terminal  222 . Conventionally, the chip  1  is fixed on the socket  2  by soldering the contacts  11  and contact ends  21 . There still needs a chip assembly structure for further securing the chip  1  on the socket without soldering or clipping by clipper.  
       SUMMARY OF THE PRESENT INVENTION  
       [0006]     The object of the present invention is to provide a chip assembly structure capable of securing a chip in a socket without soldering.  
         [0007]     Another objective of the present invention is to provide a chip assembly structure capable of securing a chip in a socket more easily replaceable if there is a defect in the chip.  
         [0008]     In order to achieve mentioned objectives, the present invention provides a chip assembly structure with a cover, which comprises: a socket having four sidewalls to form a room for placing a chip and comprising a plurality of contact ends corresponding to the contacts of the chip to be placed, wherein each contact ends penetrates the socket to form an exposing solder terminal; and a cover comprising at least a flexible part against on the chip when the chip is positioned in the room.  
         [0009]     In the chip assembly structure with a cover of the present invention, the socket further comprises a fixing part and the cover comprises a counter part so that the cover is fixed on the socket by the engagement of the fixing part and the counter part. In the present invention, the counterpart means that the part is in the shape which can be associated and engaged with the fixing part. Therefore, the shape of the counterpart is determined depending on the shape of the fixing part and shapes of the fixing part and counterpart are not limited as long as the both parts can be fixed together by engagement with each other.  
         [0010]     In the chip assembly structure with a cover of the present invention, one end of said cover is physically connected to said socket.  
         [0011]     In the chip assembly structure with a cover of the present invention, the cover comprises a vertically extending part at the end opposing to the connecting part and said sidewalls of the socket corresponding to the extending part is provided with a slit trench for accommodating the extending part.  
         [0012]     In the chip assembly structure with a cover of the present invention, the cover is removable from said socket completely and comprises at least two sidewalls on which a counter part is provided.  
         [0013]     In the chip assembly structure with a cover of the present invention, the upper end of the slit trench is provided with a guiding angle for guiding the extending part inserting into the slit trench.  
         [0014]     In the chip assembly structure with a cover of the present invention, the contact ends provided in the socket penetrate the socket and extend out from the socket to form an extending lead for electrically connecting with circuit board.  
         [0015]     Alternatively, the contact ends provided in the socket penetrate the socket and expose on the bottom surface of the socket to electrically connect with circuit board.  
         [0016]     These and other features and advantages of the present invention will become readily apparent to those skilled in this art from the following description by reference to preferred embodiments of the present invention. As it will be realized, various modifications and change can be made without departing from the spirit and scope of the present invention. Such drawings and descriptions are used only for illustrating the present invention without limiting its scope.  
     
    
     BRIEF DESCRIPTION OF THE DRAWINGS  
       [0017]      FIG. 1  shows schematic view of a prior art of a chip assembly structure.  
         [0018]      FIG. 2  shows a cross-section view of a contact end in the chip assembly structure shown in  FIG. 1 .  
         [0019]      FIG. 3  shows a cross-section view of the first embodiment of the present chip assembly structure with a cover.  
         [0020]      FIG. 4  shows a cross-section view of the second embodiment of the present chip assembly structure with a cover.  
         [0021]      FIG. 5  shows a cross-section view of the third embodiment of the present chip assembly structure with a cover wherein the cover has not yet fixed on the socket.  
         [0022]      FIG. 6  shows a cross-section view of the fourth embodiment of the present chip assembly structure with a cover wherein the cover fixes on the socket.  
         [0023]      FIG. 7  shows an exploded view of the chip assembly structure shown in  FIG. 3 .  
         [0024]      FIG. 8  shows an exploded view of the chip assembly structure shown in  FIG. 5 .  
         [0025]      FIG. 9  shows a cross-section view of the fifth embodiment of the present chip assembly structure with a cover.  
         [0026]      FIG. 10  shows a cross-section view of the sixth embodiment of the present chip assembly structure with a cover.  
         [0027]      FIG. 11  shows an exploded view of the seventh embodiment of the present chip assembly structure with a cover.  
         [0028]      FIG. 12  shows a cross-section view of an alternative embodiment of the contact end in socket of the chip assembly structure of the present invention. 
     
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS  
       [0029]      FIG. 3  shows a cross-section view of the first embodiment of the present chip assembly structure with a cover. As shown in  FIG. 3 , the chip assembly structure with a cover according to the present invention includes a socket  31  having four sidewalls  36  to form a room  38  for placing a chip  35  and a cover  32  having at least two sidewalls  39  and a flexible part  34  on its lower surface for against the chip  35 . On an outer surface of at least two sidewalls  36  is provided with a bulging part  37  (fixing part) and on the inner surface of the sidewalls  39  is provided with a sunk part  33  (the counter part) for engaging with the bulging part  37 . By using the flexible part  34  against the chip  35 , the chip  35  can be secured in the socket in its position. The material of the flexible part  34  may be made from metal or plastic material as long as it exhibits flexibility. In this embodiment, the flexible part  34  is in the form of a convexity.  
         [0030]      FIG. 4  shows a cross-section view of the second embodiment of the present chip assembly structure with a cover. The chip assembly structure with a cover shown in  FIG. 4  is similar to  FIG. 3  but the difference between them is that the flexible part  44  of the chip assembly structure of  FIG. 4  is in the form of a bending plate.  
         [0031]      FIG. 5  shows a cross-section view of the third embodiment of the present chip assembly structure with a cover wherein the cover has not yet fixed on the socket. As shown in  FIG. 5 , the chip assembly structure with a cover of the present invention includes a socket  51  and a cover  52 . The socket  51  is similar to the socket  2  shown in  FIG. 1  and comprises four sidewalls  56  to form a room  58  for placing the chip  35 . The cover  52  is connected to one of the sidewalls  56  and comprises a vertically extending part  59  at the end opposing to the connecting part and a flexible part  54  on its lower surface in a convex shape to press the chip  35  for securing the chip  35  in its position. The sidewalls  56  corresponding to the extending part  59  is provided with a slit trench  55  for accommodating the extending part  59  and a sunk part  57  is provided in the slit trench  55 . The vertically extending part  59  is provided with a bulging part  53  for engaging with the sunk part  57  when the vertically extending part  59  is inserted into the slit trench  55 . The flexible part  54  may be made from a metal or plastic as long as it exhibits flexibility. For inserting the vertically extending part  59  into the slit trench  55  smoothly, the upper end of the slit trench  55  is provided with a guiding angle  551  and either the extending part  59  or the cover  52  is made from a metal or plastic to impart them with flexibility.  
         [0032]      FIG. 6  shows a cross-section view of the fourth embodiment of the present chip assembly structure with a cover wherein the cover fixes on the socket. The chip assembly structure with a cover shown in  FIG. 6  is similar to  FIG. 5  but the difference between them is that the flexible part  64  of the chip assembly structure of  FIG. 6  is in the form of a bending plate.  
         [0033]      FIG. 7  shows an exploded view of the chip assembly structure shown in  FIG. 3  and  FIG. 8  shows an exploded view of the chip assembly structure shown in  FIG. 5 .  
         [0034]      FIG. 9  shows a cross-section view of the fifth embodiment of the present chip assembly structure with a cover. The chip assembly structure with a cover shown in  FIG. 9  is similar to  FIG. 3  but the difference between them is that on an outer surface of at least two sidewalls  96  of the chip assembly structure of  FIG. 9  is provided with a sunk part  97  and on the inner surface of the sidewalls  99  is provided with a bulging part  93  for engaging with the sunk part  97 .  
         [0035]      FIG. 10  shows a cross-section view of the sixth embodiment of the present chip assembly structure with a cover. The chip assembly structure with a cover shown in  FIG. 10  is similar to  FIG. 5  but the difference between them is that on an outer surface of the vertically extending part  109  of the chip assembly structure of  FIG. 10  is provided with a sunk part  103  and in slit trench is provided with a bulging part  107  for engaging with the sunk part  103 .  
         [0036]      FIG. 11  shows an exploded view of the seventh embodiment of the present chip assembly structure with a cover. As shown in  FIG. 11 , the chip assembly structure with a cover according to the present invention includes a socket  1102  having four sidewalls  1107  to form a room for placing a chip  1105  and a cover  1106 ; wherein the inner wall of at least two sidewalls  1107  is provided with a bulging part  1104  for restricting the cover  1106  in its position when the cover  1106  is placed and pressed toward the room. The socket  1102  is provided with multiple contact ends  1103 , which are extended from the socket  1102  to form an extending lead  1101  for electrically connecting with circuit board. Correspondingly, the chip  1105  is provided with a plurality of contacts  1108 .  
         [0037]      FIG. 12  shows a cross-section view of an alternative embodiment of the contact end in socket of the chip assembly structure of the present invention. As shown in  FIG. 12 , the contact ends  1201  provided in the socket  1203  penetrate the socket and expose on the bottom surface of the socket to form lead  1202  for electrically connecting with circuit board.  
         [0038]     According to the chip assembly structure of the present invention, the chip can be secured in the socket without soldering or clipping by a clipper and the chip is easily replaceable if there is a defect on the chip.  
         [0039]     Although the invention has been described and illustrated with reference to specific illustrative embodiments thereof, it is not intended that the invention be limited to those illustrative embodiments. Those skilled in the art will recognize that variations and modifications can be made without departing from the spirit of the present invention. It is therefore intended to include within the invention all such variations and modifications which fall within the scope of the appended claims and equivalents thereof.