Thermal interface devices

Patent metadata

Field	Value
Publication number	US-9615486-B2
Application number	US-201414225461-A
Country	US
Kind code	B2
Filing date	Mar 26, 2014
Priority date	Mar 26, 2014
Publication date	Apr 4, 2017
Grant date	Apr 4, 2017

Abstract

A thermal interface device having a containment structure and a thermal conductor is provided. Further, the containment structure includes at least one wall, where the containment structure is configured to facilitate passage of heat. Furthermore, the thermal interface device includes a thermal conductor disposed at least in a portion of the containment structure. Moreover, the thermal conductor is configured to reversibly switch between a solid state and a liquid state. Also, the thermal interface device is a re-workable device.

First claim

The invention claimed is:

1. A thermal interface device, comprising:
a containment structure having at least one wall, wherein the containment structure is configured to facilitate passage of heat from a heat source; and
a thermal conductor disposed in at least a portion of the containment structure, wherein the thermal conductor is configured to reversibly switch between a solid state and a liquid state,
wherein the thermal interface device is a re-workable device; and
wherein the thermal interface device is coupled to the heat source without any additional coupling media, or physical features to facilitate coupling between the thermal interface device and the heat source.

2. The thermal interface device of claim 1 , wherein the containment structure comprises a conformable reservoir.

3. The thermal interface device of claim 1 , wherein a material for the containment structure consists of an electrically insulating polymer.

4. The thermal interface device of claim 1 , wherein the containment structure comprises copper, graphene, silicone, aluminum, polyvinyl chloride, polyimide, polyurethane, polyester, polyamide, or combinations thereof.

5. The thermal interface device of claim 1 , wherein a thickness of the at least one wall of the containment structure is in a range from about 1 nm to about 100 microns.

6. The thermal interface device of claim 1 , further comprising an electrically insulating layer disposed on at least a portion of the containment structure.

7. The thermal interface device of claim 1 , further comprising a diffusion barrier disposed between the thermal conductor and the at least one wall of the containment structure.

8. The thermal interface device of claim 1 , further comprising one or more conforming components operatively coupled to the containment structure.

9. The thermal interface device of claim 8 , wherein the one or more conforming components are disposed in the containment structure, disposed on the containment structure, or both.

10. The thermal interface device of claim 9 , wherein the one or more conforming components are configured to receive at least a portion of the thermal conductor.

11. The thermal interface device of claim 8 , wherein the one or more conforming components are bellows, flexible membranes, or combinations thereof.

12. The thermal interface device of claim 1 , further comprising one or more shape changing components disposed in the containment structure, the thermal conductor, or both.

13. The thermal interface device of claim 12 , wherein the one or more shape changing components are deformable meshes, spring like structures, or a combination thereof.

14. The thermal interface device of claim 1 , wherein the thermal conductor comprises a metal alloy.

15. The thermal interface device of claim 1 , wherein the thermal conductor further comprises a plurality of thermally conductive elements.

16. The thermal interface device of claim 15 , wherein the plurality of thermally conductive elements comprises diamond, copper, carbon nanotubes, graphene, or combinations thereof.

17. The thermal interface device of claim 1 , wherein a thickness of the thermal interface device is in a range from about 25 microns to 500 microns.

18. A thermal interface assembly, comprising:
a heat source;
a heat sink;
a thermal interface device disposed between the heat source and the heat sink, wherein the thermal interface device comprises:
a containment structure having at least one wall, wherein the containment structure is configured to facilitate passage of heat;
a thermal conductor disposed at least in at least a portion of the containment structure, wherein the thermal conductor is configured to reversibly switch between a solid state and a liquid state,
wherein the thermal interface device is a re-workable device; and
wherein the containment structure consists of an electrically insulating polymer.

19. The thermal interface assembly of claim 18 , wherein the thermal interface device is directly disposed between the heat source and the heat sink.

20. The thermal interface assembly of claim 18 , wherein the thermal interface device is configured to conform at least in part to at least a portion of the heat source.

21. The thermal interface assembly of claim 18 , wherein the heat source is an active heat source, a passive heat source, or both.

22. A method for using a thermal interface device, comprising:
compressing at least a portion of the thermal interface device, wherein the thermal interface device comprises:
a containment structure having at least one wall, wherein the containment structure is configured to facilitate passage of heat;
a thermal conductor disposed in at least a portion of the containment structure, wherein the thermal conductor is configured to reversibly switch between a solid state and a liquid state, and wherein the thermal interface device is a re-workable device;
removably disposing the thermal interface device on at least a portion of a heat source;
disposing a heat sink directly on the thermal interface device;
de-compressing the compressed portion of the thermal interface device to provide a path of low thermal resistance between the heat source and the heat sink via the thermal interface device;
providing power to an electronic system, wherein the electronic system employs the heat source and the heat sink; and
wherein the thermal interface device is coupled to the heat source without any additional coupling media, or physical features to facilitate coupling between the thermal interface device and the heat source.

23. The thermal interface assembly of claim 18 , wherein the thermal interface device is coupled to the heat source without any additional coupling media, or physical features to facilitate coupling between the thermal interface device and the heat source.

Assignees

• Gen Electric

Inventors

• De Bock Hendrik Pieter Jacobus
• Labhart Jay Todd
• Chauhan Shakti Singh
• Kirk Graham Charles
• Kim Joo Han

Classifications

• H10W40/735

  by melting or evaporation of solids · CPC title

• H10W40/77

  Auxiliary members characterised by their shape · CPC title

• H10W40/73

  for cooling by change of state · CPC title

• H10W40/70 Primary

  Fillings or auxiliary members in containers or in encapsulations for thermal protection or control · CPC title

• H01L2924/15311

  Electricity · mapped topic