US5045972A
Expired / Lapsed
US
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High thermal conductivity metal matrix composite
Assignee: DWA COMPOSITE SPECIALITIES Inc
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Filing: 1990-08-27
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Granted: 1991-09-03
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Expires: 2010-08-27
Abstract
Abstract A thermally conductive diamond metal composite consisting essentially of 5 to 80 volume percent diamond particles having a particle size ranging from about 1 to 50 μm and a metal matrix comprising a thermally conductive metal. Preferably, a fine metal powder having particle size below 53 microns is utilized as the source for the metal matrix.
Inventors
- 👤 Edward C. Supan
- 👤 Joseph F. Dolowy, Jr.
- 👤 Bradley A. Webb
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:31
CPC Classifications
B; B32; B32B; B32B15/00; H; H10; H10W; H10W40/00; H10W40/20; H10W40/25; H10W40/257; C; C22; C22C; C22C26/00; H10W40/254; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12014; Y10T428/12028; Y10T428/12049; Y10T428/12056; Y10T428/30
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
52 words
An electronic device having on at least one surface thereof a thermally conductive composite layer as a heat sink consisting essentially of a metal matrix selected from the group consisting of aluminum, magnesium, copper, silver and alloys thereof and diamond particles having a particulate size ranging from about 1 to 50 μm.
Claim 2
Dependent Claim
52 words
An electronic device having on at least one surface thereof a thermally conductive composite layer as a heat sink consisting essentially of a metal matrix selected from the group consisting of aluminum, magnesium, copper, silver and alloys thereof and diamond particles having a particulate size ranging from about 1 to 50 μm.
Claim 3
Dependent Claim
17 words
The device of claim 1 wherein the composite contains between 5 to 80 volume percent diamond particles.
Claim 4
Dependent Claim
19 words
The device of claim 2 wherein the diamond particles have a size range of between 1 to 40 μm.
Claim 5
Dependent Claim
19 words
The device of claim 3 wherein the diamond particles have a size range of between 10 to 30 μm.
Claim 6
Dependent Claim
11 words
The devices of claim 4 wherein the metal matrix is Al.
Claim 7
Dependent Claim
11 words
The device of claim 4 wherein the metal matrix is Mg.
Claim 8
Dependent Claim
11 words
The device of claim 4 wherein the metal matrix is Cu.
Claim 9
Dependent Claim
11 words
The device of claim 4 wherein the metal matrix is Ag.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-09-02 | 1995-03-04 | 1995-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-09-02 | 1999-03-04 | 1999-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-09-02 | 2003-03-04 | 2003-09-03 | $7700.00 | Window Closed / Lapsed |