US5039577A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hybrid metal matrix composite chassis structure for electronic circuits
Assignee: DWA COMPOSITE SPECIALITIES Inc
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Filing: 1990-05-31
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Granted: 1991-08-13
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Expires: 2010-05-31
Abstract
Abstract A hybrid chassis structure including a layer of particulate reinforced metal and a layer of graphite fiber reinforced metal bonded to the particulate reinforced metal layer, wherein the overall thermal expansion, thermal conductivity and elasticity properties of the bonded hybrid structure are determined by controlling the properties of the respective layers.
Inventors
- 👤 Albert C. Knoell
- 👤 Timothy A. Loftin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 00:59
CPC Classifications
B; B32; B32B; B32B15/00; B32B15/01; B32B15/14; B32B9/00; B32B9/005; B32B9/007; B32B9/04; B32B9/041; H; H05; H05K; H05K1/00; H05K1/02; H05K1/03; H05K1/05; H05K5/00; H05K5/0091; H05K5/0095; B32B2262/00; B32B2262/10; B32B2262/106; B32B2307/00; B32B2307/30; B32B2307/302; B32B2311/00; B32B2311/24; Y; Y10; Y10S; Y10S165/00; Y10S165/905; Y10T; Y10T428/00; Y10T428/12; Y10T428/12486; Y10T428/12493; Y10T428/12535; Y10T428/12625; Y10T428/12736; Y10T428/12764
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
50 words
A composite article comprising: a layer of particulate reinforced metal comprising aluminum reinforced with ceramic powder; and a layer of graphite fiber reinforced metal bonded to said particulate reinforced metal layer, wherein the overall properties of the bonded composite are determined by controlling the properties of said respective metal layers.
Claim 2
Dependent Claim
50 words
A composite article comprising: a layer of particulate reinforced metal comprising aluminum reinforced with ceramic powder; and a layer of graphite fiber reinforced metal bonded to said particulate reinforced metal layer, wherein the overall properties of the bonded composite are determined by controlling the properties of said respective metal layers.
Claim 3
Dependent Claim
21 words
The article of claim 1 wherein said layer of particulate reinforced metal includes up to about 55% particulate reinforcement by volume.
Claim 4
Dependent Claim
22 words
The article of claim 1 wherein said layer of graphite fiber reinforced metal includes up to about 60% graphite fibers by volume.
Claim 5
Dependent Claim
13 words
The article of claim 1 wherein said layers are bonded by diffusion bonding.
Claim 6
Dependent Claim
12 words
The article of claim 1 wherein said ceramic powder comprises silicon carbide.
Claim 7
Dependent Claim
12 words
The article of claim 1 wherein said ceramic powder comprises boron carbide.
Claim 8
Dependent Claim
13 words
The article of claim 1 wherein said graphite reinforced metal layer comprises aluminum.
Claim 9
Dependent Claim
69 words
A chassis structure for supporting electronic circuits mounted on a predetermined substrate, comprising: a layer of particulate reinforced metal comprising aluminum reinforced with ceramic powder; and a layer of graphite fiber reinforced metal bonded to said particulate reinforced metal layer, wherein the thermal expansion characteristics of the bonded layers are matched to the thermal expansion characteristics of the predetermined substrate by controlling the properties of said respective metal layers.
Claim 10
Dependent Claim
69 words
A chassis structure for supporting electronic circuits mounted on a predetermined substrate, comprising: a layer of particulate reinforced metal comprising aluminum reinforced with ceramic powder; and a layer of graphite fiber reinforced metal bonded to said particulate reinforced metal layer, wherein the thermal expansion characteristics of the bonded layers are matched to the thermal expansion characteristics of the predetermined substrate by controlling the properties of said respective metal layers.
Claim 11
Dependent Claim
22 words
The chassis structure of claim 8 wherein said layer of particulate reinforced metal includes up to about 55% particulate reinforcement by volume.
Claim 12
Dependent Claim
23 words
The chassis structure of claim 8 wherein said layer of graphite fiber reinforced metal includes up to about 60% graphite fibers by volume.
Claim 13
Dependent Claim
14 words
The chassis structure of claim 8 wherein said layers are bonded by diffusion bonding.
Claim 14
Dependent Claim
13 words
The chassis structure of claim 8 wherein said ceramic powder comprises silicon carbide.
Claim 15
Dependent Claim
13 words
The chassis structure of claim 8 wherein said ceramic powder comprises boron carbide.
Claim 16
Dependent Claim
14 words
The chassis structure of claim 8 wherein said graphite reinforced metal layer comprises aluminum.
References Cited (Backward Citations)
JPS62127159A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-08-12 | 1995-02-11 | 1995-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-08-12 | 1999-02-11 | 1999-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-08-12 | 2003-02-11 | 2003-08-13 | $7700.00 | Window Closed / Lapsed |