Canted coil spring interposing connector

• US 5,061,191 A
• Filed: 12/21/1990
• Issued: 10/29/1991
• Est. Priority Date: 12/21/1990
• Status: Expired due to Fees

• Current Assignee: AMP Limited
• Original Assignee: AMP Limited
• Inventors: Deak, Frederick R., Casciotti, Albert, Wrisley, David B. Jr., Dery, Ronald A.
• Primary Examiner(s): Bradley, Paula A.
• Application Number:
  US07/631,821
• Time in Patent Office: 312 Days
• Field of Search: 439/66, 439/74, 439/245, 439/247, 439/248, 439/591, 439/840, 29/842, 29/845, 29/883, 29/884
• US Class Current: 439/66
• CPC Class Codes: H01L 2023/405 heatsink to package
• CPC Class Codes: H01L 2023/4062 heatsink to or through board or cabinet
• CPC Class Codes: H01L 23/4006 with bolts or screws
• 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 12/714 with contacts abutting directly the printed circuit; Button contacts therefore provided on the printed circuit
• CPC Class Codes: H01R 13/2492 multiple contact points
• CPC Class Codes: Y10T 29/49153 with shaping or forcing terminal into base aperture

Abstract

An interposing connector for interconnecting a pattern of conductive areas of opposing spaced apart surfaces. The connector includes a housing having one or more openings therethrough. A plurality of canted coil springs are positioned within the housing so that outer coil portions are exposed to engage the conductive areas of the opposing surfaces to thereby establish the electrical interconnection. The canted coil springs are secured to the housing by retaining means, such as a retainer strip extending through the springs and secured to the housing. The springs may also be secured by heat staking or laser welding a portion thereof to the housing. The canted coil springs have a relatively constant compliance over a range of radial deflection. The springs also produce contact wipe over the conductive areas and establish redundant contact points therewith.

Claims

1. An interposing connector adapted for electrically interconnecting a pattern of conductive areas of opposing spaced apart surfaces, said connector comprising:

a housing having one or more openings therethrough and adapted to be positioned between the opposing surfaces;

a plurality of canted coil springs arranged in a predetermined pattern in said one or more openings, each of said springs being oriented so that at least three coils thereof establish electrically redundant connection points with the corresponding conductive areas of the opposing surfaces; and

means for retaining said canted coil springs in said one or more openings of said housing.

2. The interposing connector of claim 1 wherein said housing has a plurality of said openings therethrough arranged in said predetermined pattern, and wherein one of said springs is positioned in each of said openings.

3. The interposing connector of claim 1 wherein each of said canted coil springs has a substantially constant compliance over a predetermined range of deflection.

4. The interposing connector of claim 1 wherein each of said canted coil springs comprises beryllium copper having a gold plating thereon.

5. The interposing connector of claim 1 wherein said housing is plastic, and wherein said retainer means comprises an end portion of each of said springs being heat staked to a portion of said housing.

6. The interposing connector of claim 1 wherein said housing is ceramic with a metal layer on predetermined portions thereof, and wherein said retainer means comprises an end portion of each of said springs being welded to a portion of said metal layer.

7. The interposing connector of claim 1 wherein said housing has a predetermined thickness for limiting deflection of each of said canted coil springs to a predetermined range of deflection.

8. The interposing connector of claim 7 wherein said outer coil portions are exposed on each side of said housing.

9. An interposing connector adapted for electrically interconnecting a pattern of conductive areas of opposing spaced apart surfaces, the connector comprising:

a housing having one or more openings therethrough and adapted to be positioned between the opposing surfaces;

a plurality of canted coil springs arranged in a predetermined pattern, each of said springs being oriented so that at least three coils establish electrically redundant connection points with the corresponding conductive areas of the opposing surfaces; and

means for retaining said canted coil springs in said one or more openings of said housing, said retaining means being positioned within each of said canted coil springs and secured to said housing.

10. The interposing connector of claim 9 wherein said housing has a plurality of said openings therethrough arranged in said predetermined pattern, and wherein one of said springs is positioned in each of said openings.

11. The interposing connector of claim 9 wherein said housing has a predetermined thickness for limiting deflection of each of said canted coil springs to a predetermined range of deflection.

12. The interposing connector of claim 9 wherein each of said canted coil springs has a substantially constant compliance over a predetermined range of deflection.

13. The interposing connector of claim 9 wherein each of said canted coil springs comprises beryllium copper having a gold plating thereon.

14. The interposing connector of claim 9 wherein said retainer means comprises one or more elongate strips.

15. The interposing connector of claim 14 wherein each of said strips is sized to permit a predetermined range of deflection of each of said canted coil springs.

16. The interposing connector of claim 14 wherein said housing includes one or more channels therein for receipt therein of each of said strips.

17. The interposing connector of claim 14 wherein said housing comprises two mating portions with one or more channels formed therebetween for receipt therein of each said strips.

18. The interposing connector of claim 14 wherein each of said strips are plastic, and wherein an end portion of each of said canted coil springs is heat staked to a portion of said plastic strips.

19. The interposing connector of claim 14 wherein each of said strips are ceramic with a metal layer on predetermined portions thereof, and wherein an end portion of each of said canted coil springs is laser welded to a portion of said metal layer.

20. A method of making an interposing connector adapted for electrically interconnecting a pattern of conductive areas of opposing spaced apart surfaces, said method comprising the steps of:

providing a housing having one or more openings therethrough and adapted to be positioned between the opposing surfaces;

positioning a plurality of canted coil springs in the one or more openings of the housing in a predetermined pattern corresponding to the pattern of conductive areas, with each of the springs oriented so that;

at least three coils establish electrically redundant connection points with the corresponding conductive areas of the opposing surfaces; and

securing the plurality of canted coil springs in the one or more openings of the housing.

21. The method of claim 20 wherein said step of positioning the plurality of canted coil springs comprises the steps of:

providing a canted coil spring having an alternating series of coiled and uncoiled portions; and

positioning the canted coil spring in the housing, the housing having a pattern of openings therein to receive the coiled portions of the spring and having a pattern of recesses therein to receive the uncoiled portions of the spring.

22. The method of claim 21 wherein said step of securing the canted coil spring to the housing comprises the step of heat staking the uncoiled portions of the spring to the housing.

23. The method of claim 22 further comprising the step of severing the canted coil spring through the uncoiled portions thereof to thereby form the plurality of canted coil springs.

24. The method of claim 21 wherein said step of securing the canted coil spring to the housing comprises the step of welding the uncoiled portions of the spring to a metal layer of the housing.

25. The method of claim 24 further comprising the step of severing the canted coil spring through the uncoiled portions thereof to thereby form the plurality of canted coil springs.

26. A method of making an interposing connector adapted for electrically interconnecting a pattern of conductive areas of opposing spaced apart surfaces, said method comprising the steps of:

positioning a plurality of canted coil springs on a retainer strip; and

securing the retainer strip to a housing having a plurality of openings therethrough arranged in a predetermined pattern so that outer coil portions of the springs are exposed on each side of the housing so as to be adapted to electrically interconnect corresponding conductive areas of the opposing surfaces.

27. The method of claim 26 wherein said step of securing the retainer strip to the housing comprises the steps of positioning the strip in a channel between two mating halves of the housing, and securing the mating halves together to thereby secure the retainer strip therebetween.

28. The method of claim 27 wherein said step of positioning the canted coil springs on the strip comprises the step of vibrating the plurality of springs on the strip to position each of the springs in the openings of the housing.

29. The method of claim 29 wherein said step of positioning the canted coil springs on the retainer strip comprises positioning a canted coil spring having alternating coiled and uncoiled portions on the retainer strip.

30. The method of claim 29 further comprising the step of heat staking the uncoiled portions of the canted coil spring to the retainer strip.

31. The method of claim 30 further comprising the step of severing the uncoiled portions of the canted coil spring to thereby form the plurality of canted coil springs.

32. The method of claim 29 further comprising the step of welding uncoiled portions of the canted coil spring to a metal layer of the retainer strip.

33. The method of claim 32 further comprising severing the uncoiled portions of the canted coil spring to thereby form the plurality of canted coil springs.

34. A method of making an electrical connection between a pattern of conductive areas of opposing spaced apart surfaces, said method comprising the steps of:

positioning an interposing connector between the opposing surfaces, the connector comprising a plurality of canted coil springs arranged in a housing in a pattern corresponding to the pattern of the conductive areas, with the coils secured to the housig by retainer means positioned therethrough; and

securing the connector between the opposing surfaces so that outer coil portions of the springs engage the conductive areas on the surfaces to thereby establish electrical connection therebetween.

35. The method of claim 34 further comprising the step of limiting the deflection of the canted coil springs to a predetermined range of deflection.

36. The method of claim 35 wherein the step of limiting deflection of the canted coil springs comprises the step of providing a housing having a predetermined thickness corresponding to the predetermined deflection range of the canted coil springs.