US4082622A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrodeposition of ruthenium
Assignee: AG Communication Systems Corp
•
Filing: 1977-04-20
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Granted: 1978-04-04
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Expires: 1997-04-20
Abstract
Abstract A method for the electrodeposition of a relatively thick (20 to 45 microinches) layer of ruthenium includes the step of pulse current plating an intermediate layer of gold over the substrate to be plated. The ruthenium layer so obtained is characterized by low internal stress and an absence of surface cracks.
Inventors
- 👤 Bodo G. Gebauer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:04
CPC Classifications
H; H01; H01H; H01H1/00; H01H1/02; C; C25; C25D; C25D5/00; C25D5/10; C25D5/18; C25D5/627; H01H11/00; H01H11/04; H01H11/041; H01H2011/046; Y; Y10; Y10S; Y10S204/00; Y10S204/09
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
37 words
A process for electroplating a surface of a metal article with ruthenium which comprises: pulse current plating a layer of gold on the surface of said metal article, and electroplating a ruthenium layer on said gold layer.
Claim 2
Dependent Claim
37 words
A process for electroplating a surface of a metal article with ruthenium which comprises: pulse current plating a layer of gold on the surface of said metal article, and electroplating a ruthenium layer on said gold layer.
Claim 3
Dependent Claim
15 words
A process according to claim 1 wherein said metal article comprises a remenantly magnetic material.
Claim 4
Dependent Claim
18 words
A process according to claim 1 wherein said gold layer has a minimum thickness of approximately 30 microinches.
Claim 5
Dependent Claim
18 words
A process according to claim 1 wherein said ruthenium layer has a thickness of 20 to 40 microinches.
References Cited (Backward Citations)
US3630856A
Cited
US3749650A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-04-03 | 1981-10-03 | 1982-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-04-03 | 1985-10-03 | 1986-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-04-03 | 1989-10-03 | 1990-04-04 | $7700.00 | Window Closed / Lapsed |