Electrical interconnection system utilizing fluid pressure deformed tubular contact

• US 5,073,124 A
• Filed: 07/20/1990
• Issued: 12/17/1991
• Est. Priority Date: 07/20/1990
• Status: Expired due to Fees

• Current Assignee: Affiliated Business Credit Corporation
• Original Assignee: AMP Limited
• Inventors: Powell, Francis R.
• Primary Examiner(s): Scott, J. R.
• Application Number:
  US07/556,062
• Time in Patent Office: 515 Days
• Field of Search: 200/61.43, 200/83, 200/86 R, 200/505, 200/511, 200/51.09, 200/51.1, 200/81 R, 439/197, 439/263, 439/264, 361/380-416
• US Class Current: 439/197
• CPC Class Codes: H01R 12/716 Coupling device provided on the PCB
• CPC Class Codes: H01R 13/035 Plated dielectric material
• CPC Class Codes: H01R 13/193 Means for increasing contact pressure at the end of engagement of coupling part , e.g. zero insertion force or no friction

Abstract

An electrical interconnection is provided between a tubular element (10) formed of a thin walled plastic material made conductive (16) and a further contact (18,56) by fluid pressure driving the material to engage the further contact. Positive and negative pressures are contemplated and assemblies (110) of contacts (90) are arranged to become commonly activated to interconnect arrays of contacts between electronic packages.

Claims

1. An electrical interconnection device comprising a first contact having a tubular portion formed of plastic material to define a thin wall of a thickness facilitating radial displacement in the center of the length of said portion and including a conductive surface interiorly on said wall,

said first contact having a first radial geometry in a relaxed condition and a second radial geometry in a stressed condition as driven by fluid pressure applied to said wall against one side thereof,

means to apply said fluid pressure, a second conductive contact positioned interiorly of said first contact to be electrically interconnected thereto by the application of said pressure to effect said second geometry and displace the wall and conductive surface of said first contact into engagement with the second contact to effect said interconnection.

2. The device of claim 1 wherein in that said means to apply said fluid pressure includes means to apply a positive pressure against the wall of said first contact.

3. The device of claim 1 wherein in that said means to apply said fluid pressure includes means to apply a negative pressure to said wall of said first contact.

4. The device of claim 1 wherein said first contact tubular portion has both ends thereof open for insertion of a contact therewithin.

5. The device of claim 1 wherein in that said first contact includes one end thereof closed and the other end thereof open for insertion of said second contact therewithin.

6. The device of claim 1 wherein the material of said first contact is elastomeric.

7. The device of claim 1 characterized in that the first contact material is non-elastic.

8. The device of claim 7 wherein the said first contact is formed of a seamless material.

9. The device of claim 1 wherein said first contact is formed of a material including a seam.

10. The device of claim 1 wherein the said first contact includes a varying wall thickness extending along the length thereof to provide a differential radial deformation thereof responsive to said pressure.

11. The device of claim 1 wherein the said wall is of a constant thickness.

12. The device of claim 1 wherein the said first contact is formed of a conductive material.

13. The device of claim 1 wherein the said conductive surface is formed by deposition on the said wall.

14. The device of claim 1 wherein the said conductive surface extends on one side of said wall.

15. The device of claim 1 wherein the said conductive surface extends on both sides of said wall and is interconnected inside to outside.

16. The device of claim 1 where the said second contact is defined by essentially a round post.

17. The device of claim 1 wherein the said second contact has at least two flat sides.

18. The device of claim 1 wherein the said first contact has one end closed and folded within the contact to form a second tubular portion to receive a further contact inserted therewithin.

19. The device of claim 1 wherein there is included a third contact and the said second and third contacts are disposed to be engaged by the conductive surface of said first contact to interconnect said second and third contacts together.

20. The device of claim 1 wherein the said first contact includes at least one fold therein with the said fold being driven to increase the circumference of said first contact tubular portion responsive to the application of said pressure.

21. The device of claim 20 wherein the said first contact fold effects a wiping of the said second contact upon application of said pressure.

22. An interconnection system adapted to receive and interconnect an electronic package including an array of post contact members, which extend axially parallel in a given pattern

said system including a plurality of first contacts each having a tubular cross section and a conductive surface and each formed of a thin wall plastic material readily deformable in a radically inward sense,

the said first contacts being arranged in axially parallel patterns matching axially disposed patterns of post contact members of the package,

a housing having a means sealing the interior of the housing with said first contact members mounted in said housing in said pattern and a fluid medium contained within said housing and means to pressurize said fluid medium to drive said first contacts radially inwardly into engagement with the said post contact members of said package to provide an interconnection thereto.

23. The system of claim 22 wherein there is further provided a second array of contact members interconnected to a further electronic package with said further contact members extending within said housing to engage the conductive surfaces of said first contact members.

24. The system of claim 22 wherein the said housing is comprised of a top and a bottom including telescoping surfaces allowing relative displacement to effect said pressure and means are provided to hold said top and bottom relatively together to maintain said fluid pressure.

25. The system of claim 23 wherein the said fluid medium is a gas.

26. The system of claim 22 wherein the said fluid medium is a gel.

27. The system of claim 22 wherein the said fluid medium is an elastomer readily flowable under pressure.

28. An interconnection system including a tubular element formed of a thin wall material having a conductive surface to form a first contact, said element having characteristics of flexibility under pressure to be displaced radially from the first diameter inwawrdly to a reduced diameter toward the center of the longitudinal axis of said tubular element, a second conductive contact displaceable from a point removed from said element parallel to said longitudinal axis to point proximate said element, means to apply a radially inward pressure to said element to cause it to flex into engagement interconnecting to said second contact, the said tubular element having a memory such that in the absence of pressure, the element returns to the first diameter to minimize engagement and frictional force between the first and second contacts.

29. The system of claim 28 wherein the said second contact is a pin inserted within said tubular element.

30. The system of claim 28 wherein the said second contact is external of said tubular element and said tubular element is sealed to be expanded proximate said second contact by the reduced diameter to effect said interconnection.

31. The system of claim 28 wherein the said thin wall is on the order of under 0.005 inches in thickness.

32. The system of claim 28 wherein the said thin wall is on the order of less than 0.001 inches in thickness.

33. The system of claim 28 wherein the said thin wall outside diameter is on the order of less than 0.040 inches.