US5306571A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metal-matrix-composite
Assignee: DWA COMPOSITE SPECIALITIES Inc
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Filing: 1992-03-06
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Granted: 1994-04-26
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Expires: 2012-03-06
Abstract
Abstract An improved PWB thermal plane assembly having a low CTE and high thermal conductivity comprising a first and second outer layer of aluminum, at least one intermediate layer comprising a metal matrix reinforced with graphite fibers and a layer of aluminum disposed about the outside edge of said outer and intermediate layers.
Inventors
- 👤 Joseph F. Dolowy, Jr.
- 👤 Bradley A. Webb
- 👤 Mark van den Bergh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:07
CPC Classifications
H; H10; H10W; H10W40/00; H10W40/20; H10W40/25; H10W40/257; H05; H05K; H05K1/00; H05K1/02; H05K1/03; H05K1/05; H10W40/255; H05K2201/00; H05K2201/03; H05K2201/032; H05K2201/0323; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12444; Y10T428/12465; Y10T428/12486; Y10T428/12493; Y10T428/12736; Y10T428/12764; Y10T428/12771; Y10T428/12861; Y10T428/12903; Y10T428/1291
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
87 words
A thermally conductive composite useful as a printed wiring board thermal plane comprising a consolidated laminate having a first and second outer layer comprising a thermally conductive metal, at least one intermediate layer disposed between said first and second outer layers comprising a metal matrix reinforced with graphite fiber, said outer end intermediate layers having outside edges and a layer of thermally conductive material disposed about the outside edges of said outer and intermediate layers wherein the thermally conductive metal and the thermally conductive material comprise aluminum.
Claim 2
Dependent Claim
87 words
A thermally conductive composite useful as a printed wiring board thermal plane comprising a consolidated laminate having a first and second outer layer comprising a thermally conductive metal, at least one intermediate layer disposed between said first and second outer layers comprising a metal matrix reinforced with graphite fiber, said outer end intermediate layers having outside edges and a layer of thermally conductive material disposed about the outside edges of said outer and intermediate layers wherein the thermally conductive metal and the thermally conductive material comprise aluminum.
Claim 3
Dependent Claim
15 words
The composite of claim 1 wherein the graphite fibers are oriented in a single direction.
Claim 4
Dependent Claim
15 words
The composite of claim 1 wherein the graphite fibers are oriented in a cross-ply arrangement.
Claim 5
Dependent Claim
20 words
The composite of claim 1 wherein the matrix metal is selected from the group consisting of aluminum, copper and magnesium.
Claim 6
Dependent Claim
15 words
The composite of claim 4 wherein the graphite fibers are oriented in a single direction.
Claim 7
Dependent Claim
15 words
The composite of claim 4 wherein the graphite fibers are oriented in a cross-ply arrangement.
Claim 8
Dependent Claim
70 words
A thermally conductive composite useful as a printed wiring board thermal plane comprising a consolidated laminate having a first and second outer layer comprising aluminum, at least one intermediate layer disposed between said first and second outer layers comprising an aluminum matrix reinforced with graphite fiber, said outer and intermediate layers having outside edges and a layer comprising aluminum disposed about the outside edges of said outer and intermediate layers.
Claim 9
Dependent Claim
70 words
A thermally conductive composite useful as a printed wiring board thermal plane comprising a consolidated laminate having a first and second outer layer comprising aluminum, at least one intermediate layer disposed between said first and second outer layers comprising an aluminum matrix reinforced with graphite fiber, said outer and intermediate layers having outside edges and a layer comprising aluminum disposed about the outside edges of said outer and intermediate layers.
Claim 10
Dependent Claim
15 words
The composite of claim 7 wherein the graphite fibers are oriented in a single direction.
Claim 11
Dependent Claim
15 words
The composite of claim 7 wherein the graphite fibers are oriented in a cross-ply arrangement.
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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) | 1997-04-25 | 1997-10-25 | 1998-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-04-25 | 2001-10-25 | 2002-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-04-25 | 2005-10-25 | 2006-04-26 | $7700.00 | Window Closed / Lapsed |