US3982908A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nickel-gold-cobalt contact for silicon devices
Assignee: RCA Corp
•
Filing: 1975-11-20
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Granted: 1976-09-28
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Expires: 1995-11-20
Abstract
Abstract A contact for a silicon device comprises a sintered nickel layer on the silicon, a layer of gold over the sintered nickel layer, and a layer of cobalt on the layer of gold.
Inventors
- 👤 Anthony Francis Arnold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:09
CPC Classifications
H; H10; H10W; H10W72/00; H10W72/30; B; B23; B23K; B23K35/00; B23K35/001; H10D; H10D62/00; H10D62/80; H10D62/83; H10D64/00; H10D64/60; H10D64/62; H10P; H10P14/00; H10P14/40; H10P14/46; B23K2035/008; H10W72/071; H10W72/073; H10W72/07331; H10W72/07336; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/923; Y10S428/924; Y10S428/926; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12528; Y10T428/12535; Y10T428/12583; Y10T428/1259; Y10T428/12674; Y10T428/12771; Y10T428/12861; Y10T428/12889; Y10T428/12944
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
39 words
A contact for a silicon device comprising a layer of sintered nickel directly on said silicon device; a layer of gold directly on said layer of sintered nickel; and a layer of cobalt directly on said layer of gold.
Claim 2
Dependent Claim
39 words
A contact for a silicon device comprising a layer of sintered nickel directly on said silicon device; a layer of gold directly on said layer of sintered nickel; and a layer of cobalt directly on said layer of gold.
Claim 3
Dependent Claim
21 words
The contact of claim 1, wherein said layer of gold is between about 1 A and about 1,000 A in thickness.
Claim 4
Dependent Claim
21 words
The contact of claim 2, wherein said layer of cobalt is between about 500 A and about 10,000 A in thickness.
Claim 5
Dependent Claim
19 words
The contact of claim 1, wherein said contact further comprises a layer of nickel on said layer of cobalt.
Claim 6
Dependent Claim
21 words
the contact of claim 4, wherein said layer of nickel is between about 500 A and about 1,000 A in thickness.
Claim 7
Dependent Claim
21 words
The contact of claim 5, wherein said layer of gold is between about 1 A and about 1,000 A in thickness.
Claim 8
Dependent Claim
21 words
The contact of claim 6, wherein said layer of cobalt is between about 500 A and about 10,000 A in thickness.
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) | 1979-09-28 | 1980-03-29 | 1980-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-09-28 | 1984-03-29 | 1984-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-09-28 | 1988-03-29 | 1988-09-28 | $7700.00 | Window Closed / Lapsed |