US4919768A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electroplating process
Assignee: Shipley Co Inc
•
Filing: 1989-09-22
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Granted: 1990-04-24
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Expires: 2009-09-22
Abstract
Abstract A method for electroplating an article of manufacture comprising an electrically nonconductive body portion comprising treatment with sequentially a solution of a stannous salt; a solution containing a dissolved sulfide capable of reacting with said stannous salt; and a solution containing a dissolved platinum family metal; followed by electrolytic metal plating of the surface of the article.
Inventors
- 👤 John J. Bladon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 09:02
CPC Classifications
H; H05; H05K; H05K3/00; H05K3/10; H05K3/18; H05K3/188; C; C25; C25D; C25D5/00; C25D5/54; C25D5/56; H05K3/40; H05K3/42; H05K3/423; H05K3/424; H05K2203/00; H05K2203/07; H05K2203/0703; H05K2203/0716; H05K3/425; H05K3/427
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
125 words
A method for electroplating an article of manufacture comprising an electrically nonconductive body portion, said method comprising the steps of: (a) treating the surface of said nonconductor with a solution of a stannous salt; (b) treating the surface of the nonconductor with a solution containing a dissolved sulfide capable of combining with said stannous salt; (c) treating the surface of the nonconductor with a solution containing a dissolved platinum family metal; and (d) metal plating the surface of the article by passing a current between electrodes immersed in an electrolyte containing dissolved plating metal, one of said electrodes comprising said nonconductor to be plated, said nonconductor having at least a portion of its surface coated with the coating formed by steps (a) through (c) herein.
Claim 2
Independent Claim
125 words
A method for electroplating an article of manufacture comprising an electrically nonconductive body portion, said method comprising the steps of: (a) treating the surface of said nonconductor with a solution of a stannous salt; (b) treating the surface of the nonconductor with a solution containing a dissolved sulfide capable of combining with said stannous salt; (c) treating the surface of the nonconductor with a solution containing a dissolved platinum family metal; and (d) metal plating the surface of the article by passing a current between electrodes immersed in an electrolyte containing dissolved plating metal, one of said electrodes comprising said nonconductor to be plated, said nonconductor having at least a portion of its surface coated with the coating formed by steps (a) through (c) herein.
Claim 3
Dependent Claim
12 words
The method of claim 1 where the stannous solution includes an alcohol.
Claim 4
Dependent Claim
16 words
The method of claim 1 where the stannous solution is a solution of a stannous halide.
Claim 5
Dependent Claim
12 words
The process of claim 3 where the stannous halide is stannous chloride.
Claim 6
Dependent Claim
14 words
The process of claim 3 where the stannous content is at least 0.01 molar.
Claim 7
Dependent Claim
15 words
The process of claim 5 where the stannous content varies between 1.0 and 3.5 molar.
Claim 8
Dependent Claim
18 words
The process of claim 1 where the sulfide containing solution is an aqueous solution of a sulfide salt.
Claim 9
Dependent Claim
14 words
The process of claim 7 where the sulfide salt is an alkali metal sulfide.
Claim 10
Dependent Claim
15 words
The process of claim 7 where the sulfide content ranges between 0.00001 and 1.0 molar.
Claim 11
Dependent Claim
15 words
The process of claim 7 where the sulfide content ranges between 0.1 and 0.01 molar.
Claim 12
Dependent Claim
30 words
The process of claim 1 where the platinum family metal solution is a solution of a platinum family metal salt selected from the group consisting of platinum and palladium salts.
Claim 13
Dependent Claim
12 words
The process of claim 11 where the platinum family metal is palladium.
Claim 14
Dependent Claim
15 words
The process of claim 12 where the solution is an aqueous acidic solution of palladium.
Claim 15
Dependent Claim
16 words
The solution of claim 13 where the solution is a palladium chloride solution in hydrochloric acid.
Claim 16
Dependent Claim
17 words
The process of claim 11 where the platinum family metal content varies between 0.001 and 0.01 molar.
Claim 17
Dependent Claim
14 words
The process of claim 15 where the concentration varies between 0.005 and 0.01 molar.
Claim 18
Dependent Claim
12 words
The method of claim 1 where the article is plated with copper.
Claim 19
Dependent Claim
12 words
The method of claim 1 where the article is plated with solder.
Claim 20
Dependent Claim
11 words
An article of manufacture formed by the process of claim 1.
Claim 21
Dependent Claim
13 words
The article of claim 19 where the article is a printed circuit board.
Claim 22
Dependent Claim
14 words
The article of claim 20 where the printed circuit board has plated through holes.
Claim 23
Dependent Claim
11 words
An article of manufacture formed by the process of claim 14.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-04-23 | 1993-10-23 | 1994-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-04-23 | 1997-10-23 | 1998-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-04-23 | 2001-10-23 | 2002-04-24 | $7700.00 | Window Closed / Lapsed |