US3877981A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of electroless plating
Assignee: RCA Corp
•
Filing: 1973-04-30
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Granted: 1975-04-15
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Expires: 1993-04-30
Abstract
Abstract A thin, discontinuous film of a catalyst is deposited on a surface to be plated. The surface is rinsed with a solution which includes a wetting agent for the surface, and is then electrolessly plated with a metal.
Inventors
- 👤 Anthony Francis Arnold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:54
CPC Classifications
C; C23; C23C; C23C18/00; C23C18/16; C23C18/18; C23C18/20; C23C18/28; C23C18/30; H; H10; H10P; H10P14/00; H10P14/40; H10P14/46
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
75 words
IN A METHOD OF ELECTROLESSLY DEPOSITING A METAL CATALYZED BY A FILM OF PALLADIUM ON A SUBSTRATE SURFACE, COMPRISING: DEPOSITING A THIN, DISCONTINUOUS FILM OF PALLADIUM ON SAID SURFACE, RINSING SAID SURFACE, AND ELECTROLESSLY DEPOSITING A METAL ON SAID SURFACE, THE IMPROVEMENT COMPRISING RINSING SAID SURFACE, AFTER DEPOSITING SAID FILM OF PALLADIUM, IN AN AQUEOUS SOLUTION CONTAINING A WETTING AGENT THAT DOES NOT INTERFERE WITH THE SUBSEQUENT ELECTROLESS DEPOSITION OF SAD METAL ON SAID SURFACE.
Claim 2
Dependent Claim
75 words
IN A METHOD OF ELECTROLESSLY DEPOSITING A METAL CATALYZED BY A FILM OF PALLADIUM ON A SUBSTRATE SURFACE, COMPRISING: DEPOSITING A THIN, DISCONTINUOUS FILM OF PALLADIUM ON SAID SURFACE, RINSING SAID SURFACE, AND ELECTROLESSLY DEPOSITING A METAL ON SAID SURFACE, THE IMPROVEMENT COMPRISING RINSING SAID SURFACE, AFTER DEPOSITING SAID FILM OF PALLADIUM, IN AN AQUEOUS SOLUTION CONTAINING A WETTING AGENT THAT DOES NOT INTERFERE WITH THE SUBSEQUENT ELECTROLESS DEPOSITION OF SAD METAL ON SAID SURFACE.
Claim 3
Dependent Claim
12 words
A method according to claim 1 in which said metal is nickel.
Claim 4
Dependent Claim
17 words
A method according to claim 2 in which said wetting agent is a low molecular weight alcohol.
Claim 5
Dependent Claim
12 words
A method according to claim 3 in which said alcohol is propanol.
Claim 6
Dependent Claim
26 words
A method according to claim 4 in which said propanol is present in an amount of at least about 10% by volume of the rinsing solution.
Claim 7
Dependent Claim
12 words
A method according to claim 1 in which said substrate is silicon.
References Cited (Backward Citations)
US2490760A
Cited
US2556540A
Cited
US3399268A
Cited
US3607379A
Cited
US3632435A
Cited
US3674550A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-04-14 | 1978-10-14 | 1979-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-14 | 1982-10-14 | 1983-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-14 | 1986-10-14 | 1987-04-15 | $7700.00 | Window Closed / Lapsed |