Low temperature conduction module with gasket to provide a vacuum seal and electrical connections

• US 5,247,424 A
• Filed: 06/16/1992
• Issued: 09/21/1993
• Est. Priority Date: 06/16/1992
• Status: Expired due to Fees

• Current Assignee: International Business Machines Corporation
• Original Assignee: International Business Machines Corporation
• Inventors: Hutchinson, Matthew A., Harris, Willard S., Konian, Richard R., Ossolinski, Edward J., Vasile, Vincent C.
• Primary Examiner(s): Thompson, Gregory D.
• Application Number:
  US07/899,414
• Time in Patent Office: 462 Days
• Field of Search: 174/52.3, 174/65 R, 174/151, 174/254, 174/268, 277/901, 361/386-389, 361/398, 361/395, 361/399, 361/413, 361/424, 439/271-272, 439/275, 439/278-279, 439/587, 439/604, 439/736
• US Class Current: 361/704
• CPC Class Codes: H01R 13/5202 Sealing means between parts of housing or between housing part and a wall, e.g. sealing rings
• CPC Class Codes: H01R 13/533 Bases, cases made for use in extreme conditions, e.g. high temperature, radiation, vibration, corrosive environment, pressure H01R13/52 takes precedence
• CPC Class Codes: Y10S 277/913 Seal for fluid pressure below atmospheric, e.g. vacuum

Abstract

A gasket is fabricated with electrical flex cables extending through the gasket in order to electrically communicate from the outside of a vacuum chamber with the electrical devices positioned within a vacuum chamber of a cryogenically cooled module. The gasket is fabricated from elastomeric, dielectric materials such as neoprene to effect a seal between the portions of the vacuum chamber and also to seal between the gasket material and the conductors of the flex cables which pass through the gasket.

Claims

1. A vacuum container for enclosing electronic devices and maintaining a vacuum surrounding said devices, comprising

a first shell having a first sealing surface;

a second shell having a second sealing surface;

a unitary gasket having a shape conforming to said first and second sealing surfaces of said shells for preserving vacuum conditions within said shells;

said gasket formed of an elastomeric, dielectric material;

said first and second shells disposed proximate to each other and with said sealing surfaces in contact with said gasket and said elastomeric, dielectric material in surface-to-surface contact with said first and second sealing surfaces;

flexible electrical conductors having a first and second ends and extending from outside said shells to inside said shells through said gasket, said electrical conductors surrounded by and in intimate surface-to-surface contact with said elastomeric, dielectric gasket material;

said gasket and said flexible conductors disposed between said sealing surfaces to seal said container;

a connector attached to at least one of said first and second ends of said flexible conductors,

whereby said conductors are sealed within said gasket for maintaining said vacuum within said container and provide electrical conduction paths from outside said container to within said container without disturbing said vacuum.

2. The container of claim 1 wherein said flexible conductors are wires of a flat flexible ribbon cable with said wires being without said insulation in a region where said conductors extend through said gasket.

3. The container of claim 2 wherein said gasket is formed around and sealed to said flexible conductors.

4. The container of claim 3 further comprising a holding means, wherein said holding means further comprises clamping means for compressing said gasket intermediate said shells.

5. A low-temperature, high-vacuum container for maintaining a sealed environment for electronic devices comprising:

first and second shell portions each having at least an internal surface and enclosing electronic devices;

said shell portions formed of a thermally conductive material;

a unitary elastomeric, dielectric gasket intermediate said shell portions and sealingly engaging said first and second shell portions for maintaining vacuum conditions within said container;

said gasket having a plurality of electrical conductors extending through, surrounded by and in intimate surface-to-surface sealing contact with said unitary, elastomeric, dielectric gasket;

said conductors connected to said electronic devices;

said electronic devices mounted on one of said interior surfaces of said container and in thermally conductive communication with said one internal surface,

whereby at least a portion of said container may be cooled to a low-temperature to effect the conduction of heat from said electronic devices to one of said shell portions.

6. The container of claim 5 wherein said conductors are wires of a flat ribbon cable with said wires being without said insulation in a region where said conductors extend through said gasket.

7. The container of claim 6 wherein said gasket is formed around and sealed to said conductors.

8. The container of claim 7 wherein said first and second shell portions further comprise clamping means for clamping and compressing said gasket intermediate said shell portions.

9. A gasket for sealing a container having two shell portions and for providing electrical connections between electronic devices within said container and electronic devices outside said container, comprising:

a plurality of conductors having a length, two ends, wires and insulation surrounding said wires in regions extending from each of said two ends and terminating to leave said wires exposed for a portion of said length;

elastomeric, dielectric material formed in a shape of a unitary gasket having sealing surfaces for engagement with said shell portions;

one end and a portion of each said wires extending to within a region circumscribed by said gasket and a second end and a portion of each of said wires disposed outside said region and said gasket;

said elastomeric dielectric material of said unitary gasket surrounding said conductors at said exposed portion of said length of exposed wire and sealingly adhered to said wires in surface-to-surface engagement,

thereby forming an air tight seal between said wires and said elastomeric material.

10. The gasket of claim 9 wherein said conductors comprise a flat ribbon cable.

11. The gasket of claim 10 wherein said conductors comprise connection means for connecting said wires to said electronic devices outside said container.

12. A gasket for sealing a vacuum container and conducting electrical signals through said gasket, comprising:

a dielectric, elastomeric material forming a deformable unitary gasket;

a flat flexible cable molded into said deformable gasket, said dielectric, elastomeric material of said gasket disposed in surface-to-surface engagement with and forming a seal with said flat flexible cable with ends inside and outside a vacuum container sealed by said gasket;

means for directly coupling one end of said flat cable to electronic devices within a vacuum container, sealed by said gasket.

13. The gasket of claim 12 wherein said flat flexible cable comprises a plurality of conductive wires having ends and insulation surrounding each of said wires, in regions proximate one of said ends and extending toward another of said ends, but leaving a portion of said wires with no insulation where said wires pass through said gasket and are sealed to said gasket.

14. A method of vacuum sealing a cryogenically cooled container, the method comprising the steps of:

providing a first and second portions of said cryogenically cooled container;

providing a multi-conductor ribbon cable having insulation and two ends;

removing said insulation from a portion of said multi-conductor cable to expose said conductors in a region intermediate said ends;

forming a unitary gasket of an elastomeric, dielectric material in surface-to-surface engagement surrounding said flat cable at a region including said exposed conductors;

disposing said gasket between said first and second portions of said cryogenically cooled container;

compressing said gasket between said portions of said container; and

creating a vacuum within said container.

15. The method of claim 14 wherein said step of removing insulation includes the step of chemically etching said insulation until said insulation is removed in a desired region.

16. The method of claim 14 comprising the further step of cooling a portion of said container to a low temperature.

17. A method of preparing electrical components for operation within a vacuum and at a cryogenic temperature comprising the steps of:

providing a first and second portions of a cryogenically cooled container;

providing a multi-conductor ribbon cable having insulation and two ends;

removing said insulation from a portion of said multi-conductor cable to expose said conductors in a region intermediate said ends;

forming a gasket of an elastomeric, dielectric material surrounding in surface-to-surface engagement said flat cable at a region including said exposed conductors;

disposing said gasket between said first and second portions of said cryogenically cooled container;

compressing said gasket between said portions of said container;

evacuating said container, installing said electrical components on a surface of at least a portion of said container, and cooling at least said portion of said container to a low temperature.