US4323632A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metal composites and laminates formed therefrom
Assignee: Gould Electronics Inc
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Filing: 1980-08-15
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Granted: 1982-04-06
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Expires: 2000-08-15
Abstract
Abstract A metal composite comprising a substrate having a uniformly, mildly etched surface of an aluminum alloy, e.g. an alloy, consisting of at least about 99 wt. % aluminum, and the balance comprising specified quantities of silicon, iron, copper, manganese and zinc, and a uniformly adhering, electrocathodically deposited copper foil. The resulting peel strength between the aluminum alloy surface and the copper foil, after lamination of the composite to a resinous substrate under heat and pressure is within the range of from about 6 to about 8 lbs./in. of width of copper foil. This can be reduced to a value within the range of about 0.3 to about 2 lbs./in. of width by overplating the copper foil with a layer of zinc or indium. The resinous substrate may be a glass fiber reinforced epoxy resin, such as is used in the manufacture of printed circuit boards.
Inventors
- 👤 Betty L. Berdan
- 👤 William M. King
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 16:55
CPC Classifications
B; B32; B32B; B32B15/00; B32B15/01; B32B15/04; B32B15/08; C; C25; C25D; C25D1/00; C25D1/04; H; H05; H05K; H05K3/00; H05K3/02; H05K3/022; H05K3/025; B32B2311/00; B32B2311/20; B32B2457/00; B32B2457/08; H05K2201/00; H05K2201/03; H05K2201/0332; H05K2201/0335; H05K2201/0355; H05K2203/00; H05K2203/01; H05K2203/0147; H05K2203/0152; H05K2203/07; H05K2203/0703; H05K2203/0723; H05K2203/0726; H05K3/38; H05K3/382; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12535; Y10T428/12556; Y10T428/12569; Y10T428/12736; Y10T428/1275; Y10T428/12771; Y10T428/12861; Y10T428/12903
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
161 words
A metal composite comprising: (a) a substrate having a mildly, uniformly etched aluminum alloy surface, said alloy consisting of at least about 99 wt.% aluminum, up to about 1.00 wt.% silicon plus iron, from about 0.05 to about 0.20 wt.% copper, up to about 0.05 wt.% manganese and up to about 0.10 wt.% zinc, (b) an electrocathodically deposited foil of copper having a thickness within the range of about 0.1 to about 0.4 mils uniformly adhering directly to said surface, and (c) a coating on said copper foil of a material selected from the group consisting of zinc and indium, said coating having a thickness within the range of about 10 to about 25 microinches such that when the coated face of said copper foil is bonded by heat and pressure to a resinous substrate the peel strength between said copper foil and said aluminum alloy surface is a value within the range of from about 0.3 to about 2 lbs./in.
Claim 2
Dependent Claim
161 words
A metal composite comprising: (a) a substrate having a mildly, uniformly etched aluminum alloy surface, said alloy consisting of at least about 99 wt.% aluminum, up to about 1.00 wt.% silicon plus iron, from about 0.05 to about 0.20 wt.% copper, up to about 0.05 wt.% manganese and up to about 0.10 wt.% zinc, (b) an electrocathodically deposited foil of copper having a thickness within the range of about 0.1 to about 0.4 mils uniformly adhering directly to said surface, and (c) a coating on said copper foil of a material selected from the group consisting of zinc and indium, said coating having a thickness within the range of about 10 to about 25 microinches such that when the coated face of said copper foil is bonded by heat and pressure to a resinous substrate the peel strength between said copper foil and said aluminum alloy surface is a value within the range of from about 0.3 to about 2 lbs./in.
Claim 3
Dependent Claim
12 words
The metal composite defined in claim 1 wherein said material is zinc.
Claim 4
Dependent Claim
12 words
The metal composite defined in claim 1 wherein said material is indium.
Claim 5
Dependent Claim
24 words
A laminate comprising the metal composite defined in claim 1 in which said coating is bonded to a resinous support under heat and pressure.
Claim 6
Dependent Claim
11 words
The laminate defined in claim 4 wherein said coating is zinc.
Claim 7
Dependent Claim
11 words
The laminate defined in claim 4 wherein said coating is indium.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-04-05 | 1985-10-05 | 1986-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-04-05 | 1989-10-05 | 1990-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-04-05 | 1993-10-05 | 1994-04-06 | $7700.00 | Window Closed / Lapsed |