Electrical circuit suspension system

• US 6,613,979 B1
• Filed: 08/27/1997
• Issued: 09/02/2003
• Est. Priority Date: 01/06/1995
• Status: Expired due to Fees

• Current Assignee: Quell Corporation (Heico Corporation)
• Original Assignee: Quell Corporation (Heico Corporation)
• Inventors: Miller, Paul J., Foreman, Kevin G.
• Primary Examiner(s): Ngo, Hung V.
• Application Number:
  US08/919,934
• Time in Patent Office: 2,197 Days
• Field of Search: 298/48, 298/83, 298/84, 296/05, 439/620, 439/628, 174/52.2, 174/262, 174/267, 174/260, 174/254, 361/785, 361/789, 361/791, 361/811
• US Class Current: 174/541
• CPC Class Codes: H01L 2224/45144 Gold (Au) as principal constituent
• CPC Class Codes: H01L 2224/48 of an individual wire connector
• CPC Class Codes: H01L 25/165 Containers
• 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 2924/00011 Not relevant to the scope of the group, the symbol of which is combined with the symbol of this group
• CPC Class Codes: H01L 2924/00014 the subject-matter covered by the group, the symbol of which is combined with the symbol of this group, being disclosed without further technical details
• CPC Class Codes: H01L 2924/01005 Boron [B]
• CPC Class Codes: H01L 2924/01015 Phosphorus [P]
• CPC Class Codes: H01L 2924/01047 Silver [Ag]
• CPC Class Codes: H05K 1/0393 Flexible materials H05K1/038 takes precedence; specific organic compositions are classified in H05K1/0313 and subgroups
• CPC Class Codes: H05K 1/18 Printed circuits structurally associated with non-printed electric components H05K1/0201, H05K1/023, H05K1/0243, and H05K1/16 take precedence
• CPC Class Codes: H05K 3/284 for encapsulating mounted components H05K1/185 takes precedence

Abstract

A device and method wherein electrical components are mechanically suspended and electrically interconnected in an insulative elastomeric body, such as silicone, thereby eliminating the need for a circuit board or other circuit substrate. The device can change shape through compression, distension, flexure, and other external forces while maintaining its electrical performance and mechanical integrity. The device can be compressed and deformed to fit snugly within another device, such as the shell of an electrical connector or a plastic clamshell, simultaneously creating spring forces for reliable electrical contacts and an environmental seal. Accordingly, the device and method can be used for a wide variety of purposes such as electrical filtering for avionics, computer or automotive connectors, or a non-intrusive manner to package electronics for medical implants.

Claims

1. An apparatus suspending, interconnecting, and protecting components of an electrical circuit, the apparatus comprising:

An electrically and mechanically insulative body that changes shape when subjected to external forces;

electrical circuit components in addition to electrical interconnects suspended by the insulative body;

at least one electrical contact protruding from a surface of the insulative body; and

stretchable electrical interconnects; and

wherein the components of the electrical circuit move with respect to each other and remain in constant electrical contact as the insulative body changes shape.

2. The apparatus of claim 1 wherein the electrical circuit components are suspended within the body.

3. The apparatus of claim 1 wherein the electrical circuit components are suspended on the body.

4. The apparatus of claim 1 wherein the stetchable electrical interconnects comprise slack in wires.

5. The apparatus of claim 1 wherein the electrical contact is located at an opening within the insulative body for making an electrical connection to an external contact.

6. The apparatus of claim 5 wherein the insulative body is capable of exerting compressive forces to push the electrical contact against an external contact.

7. The apparatus of claim 1 wherein the electrical contact is located on an edge of the insulative body for making an electrical connection to an external contact.

8. The apparatus of claim 7 wherein the insulative body is capable of exerting compressive forces to push the electrical contact against an external contact.

9. The apparatus of claim 1 wherein the insulative body is capable of changing shape and dimension by being flexible, distensible, and compressible.

10. The apparatus of claim 1 wherein the insulative body comprises an elastomer.

11. The apparatus of claim 10 wherein the insulative body comprises one or more materials selected from the group consisting of silicone, RTV silicone, heat-cured silicone, two-part silicone, latex, and rubber.

12. The apparatus of claim 1 wherein the insulative body comprises one or more materials selected from the group consisting of clays, gums, and foam rubbers.

13. The apparatus of claim 1 wherein the electrical components are selected from the group consisting of capacitors, resistors, MOVs, diodes, fuses, antifuses, shorting blocks, inductors, active electronic components, and any combination thereof.

14. The apparatus of claim 1 wherein the stetchable electrical interconnects comprise conductive silicon electrical interconnects.

15. An apparatus for insulating and protecting components of an electrical circuit, the apparatus comprising:

an electrically and mechanically insulative body that changes shape;

electrical circuit components in addition to electrical interconnects suspended by the insulative body;

at least one electrical contact on a surface of the insulative body interconnected with the electrical circuit to make at least one electrical connection that fits tightly against an external electrical contact due to compressive force of the insulative body; and

stretchable electrical interconnects; and

wherein the electrical circuit components move with respect to each other and remain in constant electrical contact as the insulative body changes shape.

16. The apparatus of claim 15 wherein at least one electrical connection can be formed by the apparatus between the electrical contact and the external electrical contact such that an environmental seal is created thereby preventing the passage of dust, fluids, gases, or other contaminants through the connection.

17. The apparatus of claim 15 wherein the insulative body comprises at least one opening for fitting around an external contact pin.

18. The apparatus of claim 17 wherein the opening comprises a diameter smaller than the diameter of the external contact pin when the insulative body is not in contact with the pin, but the opening expands to comprise a diameter substantially equal to the diameter of the pin when the insulative body is fit to the pin.

19. The apparatus of claim 18 wherein the at least one opening has a non-contact diameter approximately 5% to 15% less than the diameter of the external contact pin.

20. The apparatus of claim 17 wherein the apparatus is capable of maintaining electrical contacts which shift position due to changes in the body to accommodate variable spacings between a plurality of external contact pins.

21. The apparatus of claim 15 wherein the electrical circuit components are suspended within the body.

22. The apparatus of claim 15 wherein the electrical circuit components are suspended on the body.

23. The apparatus of claim 15 wherein the stretchable electrical interconnects comprise slack in wires.

24. The apparatus of claim 15 wherein the body is capable of changing shape and dimension by being flexible, distensible, and compressible.

25. The apparatus of claim 15 wherein the body comprising an elastomer.

26. The apparatus of claim 15 wherein the body comprises one or more materials selected from the group consisting of silicone, RTV silicone, heat-cured silicone, two-part silicone, latex and rubber.

27. The apparatus of claim 15 wherein the body comprises one or more materials selected from the group consisting of clays, gums, and foam rubbers.

28. The apparatus of claim 15 wherein the electrical contact comprises conductive wire or ribbon.

29. The apparatus of claim 15 wherein the electrical contact is on a surface of the insulative body and makes electrical contact to an external outer shell electrical contact.

30. The apparatus of claim 15 wherein the electrical circuit components comprise means for filtering electromagnetic interference.

31. The apparatus of claim 30 further comprising a network of ground buses electrically connecting a plurality of chip capacitors to an external outer shell electrical contact, each of the chip capacitors being electrically connected to one of the external contacts.

32. The apparatus of claim 15 wherein the electrical circuit components comprise means for limiting electrical transients.

33. The apparatus of claim 15 wherein the electrical circuit components are selected from the group consisting of capacitors, resistors, MOVs, diodes, fuses, antifuses, shorting blocks, inductors, active electronic components, and any combination thereof.

34. The apparatus of claim 15 wherein the stetchable electrical interconnects comprise conductive silicon interconnects.