US4640747A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for surface treatment of copper product
Assignee: Mitsui Kinzoku Co Ltd
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Filing: 1985-10-23
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Granted: 1987-02-03
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Expires: 2005-10-23
Abstract
Abstract A process for surface-treating copper products, for example, a copper foil to be used for a copper-clad laminate, the resulting surface-treated copper product having a superior bond strength to a base material, resistant to etching solution, acids, etc., is provided, which process comprises electrically depositing a binary alloy consisting of 95 to 20% by weight of zinc and 5 to 80% by weight of nickel, on the surface of a copper product to form a coating layer, followed by laminating the resulting copper product onto a base material under heating and pressure, said binary alloy being converted during the lamination into a ternary alloy of zinc, nickel and copper constituting a boundary layer having a superior bond strength between the copper product and the base material.
Inventors
- 👤 Kuniki Ueno
- 👤 Naotomi Takahashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:04
CPC Classifications
C; C25; C25D; C25D5/00; C25D5/48; C25D5/50; C25D3/00; C25D3/02; C25D3/56; C25D3/562; C25D3/565; C25D5/10; C25D5/60; C25D5/605; C25D5/627; H; H05; H05K; H05K3/00; H05K3/38; H05K3/382; H05K3/384; H05K2201/00; H05K2201/03; H05K2201/0332; H05K2201/0335; H05K2201/0355; H05K2203/00; H05K2203/03; H05K2203/0307; H05K2203/07; H05K2203/0703; H05K2203/0723; H05K2203/11; H05K2203/1105; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49117; Y10T29/49124; Y10T29/4913; Y10T29/49144
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
73 words
A process for surface-treating a copper product, which process comprises electrically depositing a binary alloy consisting of 95 to 20% by weight of zinc and 5 to 80% by weight of nickel, on the surface of a copper product to form a coating layer, followed by laminating or heat-pressing copper product thus obtained onto a base material so as to convert said binary alloy into a ternary alloy of zinc, nickel and copper.
Claim 2
Dependent Claim
73 words
A process for surface-treating a copper product, which process comprises electrically depositing a binary alloy consisting of 95 to 20% by weight of zinc and 5 to 80% by weight of nickel, on the surface of a copper product to form a coating layer, followed by laminating or heat-pressing copper product thus obtained onto a base material so as to convert said binary alloy into a ternary alloy of zinc, nickel and copper.
Claim 3
Dependent Claim
34 words
A process for surface-treating a copper product according to claim 1 wherein said surface of a copper product is a roughened surface formed by a granular copper layer electrically deposited on the copper product.
Claim 4
Dependent Claim
26 words
A process for surface-treating a copper product according to claim 2 wherein said copper product is a copper foil to be used for a copper-clad laminate.
Claim 5
Dependent Claim
23 words
A process for surface-treating a copper product according to claim 3 wherein said coating layer has a thickness of 0.001 to 0.15 μm.
Claim 6
Dependent Claim
23 words
A process for surface-treating a copper product according to claim 3 wherein said coating layer has a thickness of 0.001 to 0.01 μm.
Claim 7
Dependent Claim
32 words
A process for surface-treating a copper product according to claim 3 wherein said binary alloy consists of 90 to 50% by weight of zinc and 10 to 50% by weight of nickel.
Claim 8
Dependent Claim
35 words
A process for surface-treating a copper foil according to claim 1 wherein said electro-deposition of a binary alloy is carried out using an electrolyte containing as fundamental components, potassium pyrophosphate, zinc pyrophosphate and nickel pyrophosphate.
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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) | 1990-02-02 | 1990-08-04 | 1991-02-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-02-02 | 1994-08-04 | 1995-02-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-02-02 | 1998-08-04 | 1999-02-03 | $7700.00 | Window Closed / Lapsed |