Thermally conductive polytrafluoroethylene article

• US 5,945,217 A
• Filed: 10/14/1997
• Issued: 08/31/1999
• Est. Priority Date: 10/14/1997
• Status: Expired due to Term

• Current Assignee: W. L. Gore & Associates (W.L. Gore & Associates)
• Original Assignee: Gore Enterprise Holdings Incorporated
• Inventors: Hanrahan, James R.
• Primary Examiner(s): Kincaid, Kristine
• Assistant Examiner(s): PATEL, DHIRUBHAI R
• Application Number:
  US08/950,358
• Time in Patent Office: 686 Days
• Field of Search: 524/432, 524/437, 524/428, 524/441, 524/439, 428/420, 428/421, 428/402, 428/403, 428/406, 428/407, 428/422, 428/420.21, 428/467, 174/252, 361/700, 165/104.17, 165/104.21, 165/104.23
• US Class Current: 428/389
• CPC Class Codes: H01L 23/4275 by melting or evaporation of solids
• 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: H01L 2924/09701 Low temperature co-fired ceramic [LTCC]
• CPC Class Codes: Y02E 60/14 Thermal energy storage
• CPC Class Codes: Y10T 428/2958 Metal or metal compound in coating
• CPC Class Codes: Y10T 428/2991 Coated
• CPC Class Codes: Y10T 428/2996 Glass particles or spheres
• CPC Class Codes: Y10T 428/3154 Of fluorinated addition polymer from unsaturated monomers
• CPC Class Codes: Y10T 428/31544 Addition polymer is perhalogenated

Abstract

A thermally conductive composite article is provided having a PTFE material or a PTFE matrix material which has disposed therein thermally conductive particles, and a phase change material.

Claims

1. An article comprising:

a polytetrafluoroethylene (PTFE) material;

thermally conductive particles; and

a phase change material capable of storing thermal energy as latent heat of a phase change of said phase change material.

5. The article of claims 1, 2, 3, or 4, wherein the thermally conductive particles are selected from a group consisting of:

metals;

aluminum (Al);

copper (Cu);

nickel (Ni);

silver (Ag); and

Zinc (Zn);

metal beads;

metal powders;

metal fibers;

metal coated fibers;

metal flakes;

metal coated metals;

metal coated ceramics;

metal coated glass bubbles;

metal coated glass beads;

metal coated flakes;

metal coated spheres;

zinc oxide;

aluminum oxide;

boron nitride (BN);

aluminum nitride (ALN);

diamond powder; and

silicon carbide (SiC).

6. The article of claims 1, 2, 3, or 4, wherein the phase change material is selected from a group consisting of:

salt hydrates, naphthalene, crystalline paraffins, non-paraffin organics, beeswax, oxazaline wax, crystalline polymers, high density polyethylene, solid polyhydric alcohols, fatty acids, and fatty acid esters.

7. The article of claims 1, 2, 3, or 4, wherein the phase change material is a material which changes state from a solid to a liquid or from a liquid to a solid within a temperature range of about 10°

C. to about 90°

C.

2. An article comprising:

a heat sink;

a polytetrafluoroethylene PTFE material;

thermally conductive particles; and

a phase change material.

3. An article comprising:

a heat sink;

an electronic component;

a polytetrafluoroethylene PTFE material;

thermally conductive particles; and

a phase change material;

wherein the PTFE material is disposed between the heat sink and the electronic component.

4. An article comprising:

a polytetrafluoroethylene PTFE matrix material;

thermally conductive particles; and

a phase change material;

wherein the thermally conductive particles and the phase change material are disposed within the PTFE matrix material.

8. An article comprising:

a polytetrafluoroethylene PTFE material;

thermally conductive particles; and

a phase change material;

wherein the thermally conductive particles and the phase change material are disposed within the PTFE material.