Retention mechanism for an electrical assembly

• US 6,585,534 B2
• Filed: 08/20/1998
• Issued: 07/01/2003
• Est. Priority Date: 08/20/1998
• Status: Expired due to Fees

• Current Assignee: Intel Corporation
• Original Assignee: Intel Corporation
• Inventors: Llapitan, David J., Crocker, Michael, Davison, Peter
• Primary Examiner(s): Luebke, Renee
• Assistant Examiner(s): MCCAMEY, ANN M
• Application Number:
  US09/137,520
• Publication Number:
  US 20010019913A1
• Time in Patent Office: 1,776 Days
• Field of Search: 439/327, 439/328, 439/325, 439/487, 439/573, 361/703, 361/704, 361/709-721, 361/752, 361/756, 361/741, 361/801, 361/802, 211/41.17
• US Class Current: 439/327
• CPC Class Codes: H01L 23/4093 Snap-on arrangements, e.g. clips
• CPC Class Codes: H01L 2924/00 Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
• CPC Class Codes: H01L 2924/0002 Not covered by any one of groups H01L24/00, H01L24/00 and H01L2224/00
• CPC Class Codes: H01R 12/7047 with a fastener through a screw hole in the coupling device
• CPC Class Codes: H05K 7/1405 by clips or resilient members, e.g. hooks

Abstract

A retention mechanism for an electronic assembly which has a substrate and a heat sink. The retention mechanism includes a substrate slot that receives the substrate and a heat sink slot that receives the heat sink. There may be two retention mechanisms that are attached to a printed circuit board adjacent to an electrical connector. There may be two heat sink slots symmetrically located about the substrate slot so that the mechanism can be mounted to a left side or a right side of the connector. The symmetric slots eliminate the need for a left side mechanism and a right side mechanism. The retainer mechanism may also have a nut retainer that captures a nut that is used to attach the mechanism to the printed circuit board. The nut retainer allows the nut to be transported with the retainer mechanism during an assembly process.

Claims

1. An electrical assembly, comprising:

a printed circuit board;

a retention mechanism mounted to said printed circuit board using a nut, said retention mechanism including a plurality of walls that create a heat sink slot to receive a heat sink, a substrate slot to receive a substrate, and a nut retainer to retain the nut to secure the retention mechanism to said printed circuit board; and

,

an electronic assembly that is coupled to said printed circuit board, said electronic assembly includes said substrate that is inserted into said substrate slot and said heat sink that is inserted into said heat sink slot.

2. The electrical assembly as recited in claim 1, further comprising;

a connector mounted to said printed circuit board to receive said substrate of said electronic assembly.

3. The electrical assembly as recited in claim 1, wherein said plurality of walls create a pair of heat sink slots located adjacent to said substrate slot.

4. The electrical assembly as recited in claim 1, further comprising:

a threaded stud to couple to said nut and mount said retention mechanism to said printed circuit board.

5. The electrical assembly as recited in claim 1, further comprising a backwall that is attached to said plurality of walls.

6. The electrical assembly as recited in claim 5, wherein said backwall has a first latch aperture.

7. The electrical assembly as recited in claim 6, wherein said backwall includes a latch arm.

8. The electrical assembly as recited in claim 1, wherein said printed circuit board is a motherboard and said electronic assembly is a daughtercard.

9. The electrical assembly as recited in claim 8, wherein said motherboard is a personal computer motherboard and said daughtercard includes a microprocessor.

10. The electrical assembly as recited in claim 1, wherein

said nut retainer has a pair of arms extending about a channel that receives the nut.

11. The electrical assembly as recited in claim 10, wherein

said pair of arms are flexible so that the nut can be snapped into said channel.

12. The electrical assembly as recited in claim 10, wherein

said pair of arms extends about said channel in a circular pattern.

13. The electrical assembly as recited in claim 10, wherein

a distance between ends of said pair of arms extending about said channel is less than a diameter of the nut so that the nut is captured by said nut retainer.

14. The electrical assembly as recited in claim 1, wherein

said nut retainer has a groove to receive a flange of the nut to allow the nut to be rotated onto a threaded stud.

15. The electrical assembly as recited in claim 14, wherein

a thickness of the flange of the nut is less than a height of the groove to provide space for the nut to move up and allow the nut to be rotated onto the threaded stud without cross threading.

16. A method for installing an electronic assembly which includes a substrate and a heat sink, the method comprising:

mounting a retention mechanism to a printed circuit board using a nut captured In a nut retainer in the retention mechanism and a threaded stud coupled to said nut;

inserting the substrate into a substrate slot of said retention mechanism that is mounted to said printed circuit board; and

inserting the heat sink into a heat sink slot of said retention mechanism.

17. The method as recited in claim 16, wherein a tab of the heat sink is inserted into a latch aperture of said retention mechanism.

18. The method as recited in claim 16, wherein

said mounting of said retention mechanism to said printed circuit board includes,

inserting said threaded stud through an opening in said printed circuit board and an opening in said retention mechanism, and

rotating said nut onto said threaded shaft to secure said retention mechanism to said printed circuit board.

19. The method as recited in claim 18, wherein

said mounting of said retention mechanism to said printed circuit board includes,

snapping said nut into said nut retainer of said retention mechanism.

20. An electrical assembly comprising:

a printed circuit board;

a threaded stud that extends from said printed circuit board;

a retention mechanism mounted to said printed circuit board, said retention mechanism including a plurality of walls that create a heat sink slot to receive a heat sink, said retention mechanism further having a nut retainer;

a nut that is captured by said nut retainer and is rotated onto said threaded stud;

a substrate to extend through a substrate slot of said retention mechanism

and wherein said heat sink to extend into said heat sink slot.

21. The electrical assembly as recited in claim 20, wherein

said nut retainer has a pair off arms extending about a channel that receives the nut.

22. The electrical assembly as recited in claim 21, wherein

said pair of arms are flexible so that the nut can be snapped into said channel.

23. The electrical assembly as recited in claim 21, wherein

said pair off arms extends about said channel in a circular pattern.

24. The electrical assembly as recited in claim 21, wherein

a distance between ends of said pair off arms extending about said channel is less than a diameter of the nut so that the nut is captured by said nut retainer.

25. The electrical assembly as recited in claim 20, wherein

said nut retainer has a groove to receive a flange of the nut to allow the nut to be rotated onto a threaded stud.

26. The electrical assembly as recited in claim 25, wherein

a thickness of the flange of the nut is less than a height of the groove to provide space for the nut to move up and allow the nut to be rotated onto the threaded stud without cross threading.

27. An assembly comprising:

a printed circuit board;

a first retention mechanism mounted to the printed circuit board, the first retention mechanism including

a first heat sink slot to receive a first end of a heat sink,

a first substrate slot to receive a first end of a substrate, and

a first pair of clearance holes to receive a first pair of studs;

a second retention mechanism mounted to the printed circuit board, the second retention mechanism including

a second heat sink slot to receive a second end of the heat sink,

a second substrate slot to receive a second end of the substrate,

a second pair of clearance holes to receive a second pair of studs;

the substrate to extend into the first and second substrate slots; and

the heat sink to extend into the first and second heat sink slots.

28. The assembly as recited in claim 27, further comprising:

an electrical connector aligned with the first substrate slot and the second substrate slot between the first and second retention mechanisms, the electrical connector to couple to contacts of the substrate extended through the first and second substrate slots.

29. The assembly as recited in claim 27, wherein

the first retention mechanism further includes a third heat sink slot to alternatively receive the first end of the heat sink, and

the second retention mechanism further includes a fourth heat sink slot to alternatively receive the second end of the heat sink.

30. An assembly comprising:

a printed circuit board;

a first retention mechanism mounted to the printed circuit board, the first retention mechanism including

a first heat sink slot to receive a first end of a heat sink,

a first substrate slot to receive a first end of a substrate,

a first pair of clearance holes to receive a first pair of studs, and

a third heat sink slot to alternatively receive the first end of the heat sink;

a second retention mechanism mounted to the printed circuit board, the second retention mechanism including

a second heat sink slot to receive a second end of the heat sink,

a second substrate slot to receive a second end of the substrate,

a second pair of clearance holes to receive a second pair of studs, and

a fourth heat sink slot to alternatively receive the second end of the heat sink;

the substrate to extend into the first and second substrate slots, and

the heat sink to extend into the first and second heat sink slots or the third and fourth heat sink slots.

31. The assembly as recited in claim 30, further comprising:

an electrical connector aligned with the first substrate slot and the second substrate slot between the first and second retention mechanisms, the electrical connector to couple to contacts of the substrate extended through the first and second substrate slots.

32. The assembly as recited in claim 30, wherein

the first retention mechanism further includes a third heat sink slot to alternatively receive the first end of the heat sink, and

the second retention mechanism further includes a fourth heat sink slot to alternatively receive the second end of the heat sink.