US3900599A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of electroless plating
Assignee: RCA Corp
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Filing: 1973-07-02
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Granted: 1975-08-19
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Expires: 1993-07-02
Abstract
Abstract The tendency of an electroless plating bath having a considerable amount of oxygen dissolved therein to ''''skipplate'''' on catalytic surfaces of objects immersed therein, is inhibited by the removal of at least most of the oxygen initially present in the bath.
Inventors
- 👤 Nathan Feldstein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:23
CPC Classifications
C; C23; C23C; C23C18/00; C23C18/16; C23C18/31; C23C18/1601; C23C18/1633; C23C18/1675; C23C18/1683; H; H05; H05K; H05K3/00; H05K3/10; H05K3/18; H05K3/181; H05K3/187
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
58 words
IN A PROCESS OF ELECTROLESSLY DEPOSITING A METAL ON A SURFACE WHICH IS CATALYTIC FOR THE DEPOSITION OF SAID METAL BY IMMERSING THE SURFACE TO BE PLATED IN A PLATING BATH, WHERE THE BATH HAS SUFFICIENT DISSOLVED OXYGEN THEREIN TO CAUSE PLATING SKIPS, THE IMPROVEMENT COMPRISING LOWERING THE DISSOLVED OXYGEN CONTENT SUBSTANTIALLY PRIOR TO STARTING THE PLATING OPERATION.
Claim 2
Dependent Claim
58 words
IN A PROCESS OF ELECTROLESSLY DEPOSITING A METAL ON A SURFACE WHICH IS CATALYTIC FOR THE DEPOSITION OF SAID METAL BY IMMERSING THE SURFACE TO BE PLATED IN A PLATING BATH, WHERE THE BATH HAS SUFFICIENT DISSOLVED OXYGEN THEREIN TO CAUSE PLATING SKIPS, THE IMPROVEMENT COMPRISING LOWERING THE DISSOLVED OXYGEN CONTENT SUBSTANTIALLY PRIOR TO STARTING THE PLATING OPERATION.
Claim 3
Dependent Claim
44 words
A process according to claim 1 in which the object to be plated is a phenolic laminate board and in which the process includes roughening and etching a surface of the object to be plated and then depositing a film of said catalyst thereon.
Claim 4
Dependent Claim
17 words
A process according to claim 2 in which said phenolic laminate board has many through holes therein.
Claim 5
Dependent Claim
12 words
A process according to claim 2 in which said catalyst is palladium.
Claim 6
Dependent Claim
14 words
A process according to claim 1 in which the metal being deposited is copper.
Claim 7
Dependent Claim
14 words
A process according to claim 1 in which the metal being deposited is nickel.
Claim 8
Dependent Claim
29 words
A process according to claim 1 in which said dissolved oxygen content is lowered by bubbling throughout the bath a gas which is inert with respect to the catalyst.
Claim 9
Dependent Claim
13 words
A process according to claim 7 in which said inert gas is nitrogen.
Claim 10
Dependent Claim
75 words
IN A PROCESS OF ELECTROLESSLY DEPOSITING A METAL ON A SURFACE WHICH IS CATALYTIC FOR THE DEPOSITION OF SAID METAL, COMPRISING PREPARING AN ELECTROLESS PLATING BATH BY DISSOLVING A SALT OF SAID METAL OF A REDUCING AGENT IN WATER, AND IMMERSING SAID SURFACE IN SAID PLATING BATH, THE IMPROVEMENT COMPRISING REMOVING AT LEAST MOST OF THE DISSOLVED OXYGEN IN THE WATER USED TO PREPARE SAID BATH PRIOR TO ADDING SAID SALT AND SAID REDUCING AGENT.
Claim 11
Dependent Claim
75 words
IN A PROCESS OF ELECTROLESSLY DEPOSITING A METAL ON A SURFACE WHICH IS CATALYTIC FOR THE DEPOSITION OF SAID METAL, COMPRISING PREPARING AN ELECTROLESS PLATING BATH BY DISSOLVING A SALT OF SAID METAL OF A REDUCING AGENT IN WATER, AND IMMERSING SAID SURFACE IN SAID PLATING BATH, THE IMPROVEMENT COMPRISING REMOVING AT LEAST MOST OF THE DISSOLVED OXYGEN IN THE WATER USED TO PREPARE SAID BATH PRIOR TO ADDING SAID SALT AND SAID REDUCING AGENT.
Claim 12
Dependent Claim
57 words
IN a process for electrolessly depositing a uniform coating of a metal onto a surface which is catalytic for the deposition of said metal by immersing said surface in a plating bath, the improvement which comprises removing dissolved oxygen gas from said plating bath by passing a stream of inert gas through said bath prior to plating.
Claim 13
Dependent Claim
57 words
IN a process for electrolessly depositing a uniform coating of a metal onto a surface which is catalytic for the deposition of said metal by immersing said surface in a plating bath, the improvement which comprises removing dissolved oxygen gas from said plating bath by passing a stream of inert gas through said bath prior to plating.
References Cited (Backward Citations)
US2819188A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-08-18 | 1979-02-17 | 1979-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-18 | 1983-02-17 | 1983-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-18 | 1987-02-17 | 1987-08-19 | $7700.00 | Window Closed / Lapsed |