US4588641A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Three-step plasma treatment of copper foils to enhance their laminate adhesion
Assignee: Olin Corp
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Filing: 1985-03-04
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Granted: 1986-05-13
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Expires: 2005-03-04
Abstract
Abstract A three-step plasma treatment for improving the laminate adhesion of metallic and non-metallic substrates is described. The treatment comprises sequentially exposing the substrate to a first plasma of oxygen gas, a second plasma of a hydrocarbon monomer gas and a third plasma of oxygen gas. The process has particular utility in forming polymeric films on one or more surfaces of copper or copper alloy foils to be used in printed circuit applications.
Inventors
- 👤 Reza Haque
- 👤 Edward F. Smith, III
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 00:01
CPC Classifications
B; B05; B05D; B05D1/00; B05D1/62; B05D3/00; B05D3/14; B05D3/141; B05D3/142; B05D3/145; B05D3/148; H; H05; H05K; H05K3/00; H05K3/38; H05K3/382; B05D2202/00; B05D2202/40; B05D2202/45; H05K2201/00; H05K2201/03; H05K2201/0332; H05K2201/0335; H05K2201/0355; H05K2203/00; H05K2203/09; H05K2203/095; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31511; Y10T428/31678; Y10T428/31692; Y10T428/31696; Y10T428/31721
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
42 words
A composite article comprising: a copper or copper alloy foil having a plasma deposited polymeric film on at least one surface; and a layer of plastic material bonded to said at least one foil surface on which said polymeric film is deposited.
Claim 2
Dependent Claim
42 words
A composite article comprising: a copper or copper alloy foil having a plasma deposited polymeric film on at least one surface; and a layer of plastic material bonded to said at least one foil surface on which said polymeric film is deposited.
Claim 3
Dependent Claim
18 words
The article of claim 1 further comprising said plastic material layer being formed from a fiberglass epoxy material.
Claim 4
Dependent Claim
17 words
The article of claim 1 further comprising said plastic material layer being formed from a polyimide material.
Claim 5
Dependent Claim
23 words
The article of claim 1 further comprising said film having a thickness in the range of about 100 Å to about 1000 Å.
Claim 6
Dependent Claim
13 words
The article of claim 1 wherein said article comprises a printed circuit board.
Claim 7
Dependent Claim
12 words
The article of claim 1 wherein said article comprises a flexible circuit.
Claim 8
Dependent Claim
23 words
The article of claim 1 further comprising: said polymeric film coated foil exhibiting a peel strength of at least about 4 lbs/in width.
Claim 9
Dependent Claim
28 words
The article of claim 7 further comprising: said polymeric film coated foil exhibiting a peel strength in the range of about 4 lbs/in to about 8.5 lbs/in width.
Claim 10
Dependent Claim
140 words
A composite article comprising: a metal or metal alloy substrate material having a plasma deposited polymeric film on at least one surface, said film being formed by the process of (a) forming a first plasma of predominantly oxygen gas in the vicinity of said substrate material; (b) exposing said substrate material to said first plasma for a first period of time; (c) forming a plasma of a hydrocarbon monomer gas in the vicinity of said substrate material; (d) exposing said substrate material to said hydrocarbon monomer gas plasma for a second period of time; (e) forming a second plasma of predominantly oxygen gas in the vicinity of said substrate material; and (f) exposing said substrate material to said second oxygen plasma for a third period of time; and a layer of plastic material bonded to said at least one surface.
Claim 11
Dependent Claim
140 words
A composite article comprising: a metal or metal alloy substrate material having a plasma deposited polymeric film on at least one surface, said film being formed by the process of (a) forming a first plasma of predominantly oxygen gas in the vicinity of said substrate material; (b) exposing said substrate material to said first plasma for a first period of time; (c) forming a plasma of a hydrocarbon monomer gas in the vicinity of said substrate material; (d) exposing said substrate material to said hydrocarbon monomer gas plasma for a second period of time; (e) forming a second plasma of predominantly oxygen gas in the vicinity of said substrate material; and (f) exposing said substrate material to said second oxygen plasma for a third period of time; and a layer of plastic material bonded to said at least one surface.
Claim 12
Dependent Claim
19 words
The article of claim 9 further comprising: said substrate material being formed from copper or a copper base alloy.
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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) | 1989-05-12 | 1989-11-11 | 1990-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-05-12 | 1993-11-11 | 1994-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-05-12 | 1997-11-11 | 1998-05-13 | $7700.00 | Window Closed / Lapsed |