US4529667A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Silver-coated electric composite materials
Assignee: Furukawa Electric Co Ltd
•
Filing: 1983-04-06
•
Granted: 1985-07-16
•
Expires: 2003-04-06
Abstract
Abstract A silver-coated electric material wherein a partial or total surface of an electroconductive or non-electroconductive substrate is provided with a coating of silver or silver alloy, having the first intermediate coating layer made of Ni, Co, Cr, Pd or their alloys and the second intermediate coating layer made of Sn, Cd, Pd, Ru or their alloys between the silver coating and the surface of the substrate, and the method of preparing the same.
Inventors
- 👤 Shoji Shiga
- 👤 Satoshi Suzuki
- 👤 Nariyoshi Kiso
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 05:54
CPC Classifications
B; B32; B32B; B32B15/00; B32B15/01; B32B15/018; H; H10; H10W; H10W70/00; H10W70/40; H10W70/456; H10W70/457; H10W72/00; H10W72/071; H10W72/075; H10W72/50; H10W72/551; H10W72/552; H10W72/5522; H10W72/90; H10W72/951; H10W72/952; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12708; Y10T428/12715; Y10T428/12722; Y10T428/12771; Y10T428/12785; Y10T428/12806; Y10T428/12826; Y10T428/12847; Y10T428/12861; Y10T428/12868; Y10T428/12875; Y10T428/12882; Y10T428/12896; Y10T428/12903; Y10T428/1291; Y10T428/12944
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
116 words
An electroconductive or non-electroconductive substrate partially or totally coated with silver or a silver alloy, having between said silver or silver alloy and said substrate two intermediate coating layers which comprise (1) a first intermediate layer, as a barrier layer, adjacent to said substrate layer, consisting of at least one metal selected from the group consisting of Ni, Co, Cr, Pd and alloys thereof, having a thickness of 0.1-5 μm and (2) a second intermediate layer, as an anti-oxidant layer, between said first intermediate layer and said silver or silver alloy, consisting of at least one metal selected from the group consisting of Sn, Cd, Pd, Ru or alloys thereof, having a thickness of 0.01-2 μm.
Claim 2
Dependent Claim
116 words
An electroconductive or non-electroconductive substrate partially or totally coated with silver or a silver alloy, having between said silver or silver alloy and said substrate two intermediate coating layers which comprise (1) a first intermediate layer, as a barrier layer, adjacent to said substrate layer, consisting of at least one metal selected from the group consisting of Ni, Co, Cr, Pd and alloys thereof, having a thickness of 0.1-5 μm and (2) a second intermediate layer, as an anti-oxidant layer, between said first intermediate layer and said silver or silver alloy, consisting of at least one metal selected from the group consisting of Sn, Cd, Pd, Ru or alloys thereof, having a thickness of 0.01-2 μm.
Claim 3
Dependent Claim
46 words
The substrate of claim 1, where said substrate also serves as the first intermediate coating, when the substrate is Ni, Co, Cr, Pd or alloys thereof, and when the coating of Ni, Co, Cr, Pd or alloys thereof is coated on the surface of the substrate.
Claim 4
Dependent Claim
36 words
The substrate of claim 1, wherein said first intermediate coating is made of an alloy containing not lower than 10 wt. % of a metal selected from the group consisting of Ni, Co, Cr and Pd.
Claim 5
Dependent Claim
19 words
The substrate of claim 1, wherein the second intermediate coating is made of Sn or an alloy of Sn.
Claim 6
Dependent Claim
27 words
The substrate of claim 1, wherein the second intermediate coating is made of Sn and the thickness is 1/500 to 1/10 of that of the silver coating.
Claim 7
Dependent Claim
14 words
The substrate of claim 1, wherein the first intermediate coating is a Ni-Zn alloy.
Claim 8
Dependent Claim
17 words
The substrate of claim 1, wherein said substrate is made of Cu or an alloy of Cu.
References Cited (Backward Citations)
US3443914A
Cited
US3457539A
Cited
US3648355A
Cited
DE2040463A1
Cited
JPS516818A
Cited
JPS53139173A
Cited
JPS56123394A
Cited
US4441118A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-07-15 | 1989-01-14 | 1989-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-07-15 | 1993-01-14 | 1993-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-07-15 | 1997-01-14 | 1997-07-16 | $7700.00 | Window Closed / Lapsed |