Patent US3668082A successfully refreshed from Google Patents.
US3668082A
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Method for strongly adhering a metal film on epoxy substrates
Assignee: International Business Machines Corp
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Filing: 1970-12-07
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Granted: 1972-06-06
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Expires: 1990-12-07
Abstract
Abstract An epoxy board is prepared for metal plating by dipping the same in a molten eutectic comprising 60% KOH and 40% NaOH. The epoxy board is then rinsed and neutralized, after which it is sensitized and activated conventionally and immersed in an electroless deposition bath for metal plating thereon. The resultant metal film is found to be strongly bonded to the epoxy board.
Inventors
- 👤 Glenn V Elmore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:38
CPC Classifications
H; H05; H05K; H05K3/00; H05K3/38; H05K3/381; C; C23; C23C; C23C18/00; C23C18/16; C23C18/18; C23C18/20; C23C18/2006; C23C18/2026; C23C18/2033; C23C18/2046; C23C18/2073; C23C18/208; C23C18/22; C23C18/28; C23C18/285; C23C18/30; C23C18/31; C23C18/32; C23C18/34; C23C18/36; Y; Y10; Y10S; Y10S205/00; Y10S205/924
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
25 words
In a method according to claim 1 wherein said alkali metal hydroxide eutectic melt consists of 60% by weight KOH and 40% by weight NaOH.
Claim 2
Dependent Claim
22 words
In a method according to claim 1 wherein said eutectic melt is maintained at a temperature between 167* to about 300* C.
Claim 3
Dependent Claim
27 words
In a method according to claim 1 wherein said alkali metal hydroxide eutectic melt is maintained at a temperature of about 200* C. to about 230* C.
Claim 4
Dependent Claim
27 words
In a method according to claim 1 wherein said epoxy board is immersed in said alkali metal hydroxide eutectic for about 1 minute to about 2 minutes.
Claim 5
Dependent Claim
62 words
In a method according to claim 1 wherein there is added the additional step of immersing said epoxy board in an electrolytic metal plating bath for a time to deposit a film of desired thickness and thereafter heating said metal coated epoxy board for about 5 minutes to about 30 minutes at a temperature of about 170* C. to about 190* C.
Claim 6
Dependent Claim
24 words
In a method according to claim 6 wherein said metal coated epoxy board is heated for 15 minutes at a temperature of 170* C.
References Cited (Backward Citations)
US3305460A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-06-06 | 1975-12-06 | 1976-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-06 | 1979-12-06 | 1980-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-06 | 1983-12-06 | 1984-06-06 | $7700.00 | Window Closed / Lapsed |