Patent US4042729A successfully refreshed from Google Patents.
US4042729A
Expired / Lapsed
US
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Process for the activation of resinous bodies for adherent metallization
Assignee: AMP-AKZO Corp A CORP OF
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Filing: 1975-06-18
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Granted: 1977-08-16
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Expires: 1995-06-18
Abstract
Abstract Securely bonded layers of electroless metals on bodies having a resinous surface are provided after first contacting the surface of the body with a highly active, easily controllable, readily disposable composition comprising water, permanganate ion and manganate ion, the molar ratio of manganate to permanganate being up to about 1.2 and the composition having a pH controlled in the range of 11 to 13. Means to regenerate the composition and a temperature controlled in the range of 20° to 100° C are also described.
Inventors
- 👤 Joseph Polichette
- 👤 Edward J. Leech
- 👤 John G. Branigan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:41
CPC Classifications
C; C23; C23C; C23C18/00; C23C18/16; C23C18/18; C23C18/20; C23C18/28; C23C18/30; C23C18/2006; C23C18/2026; C23C18/2033; C23C18/2046; C23C18/2073; C23C18/208; C23C18/285; H; H05; H05K; H05K3/00; H05K3/38; H05K3/381
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
68 words
In a process for producing a securely bonded layer of metal on a resinous surface by electroless metal deposition the improvement which comprises contacting the resinous surface, prior to electroless metal deposition, with a composition comprising water, permanganate ion and manganate ion in the molar ratio of manganate ion to permanganate ion of up to 1.2, said composition having a pH in the range of 11 to 13.
Claim 2
Dependent Claim
68 words
In a process for producing a securely bonded layer of metal on a resinous surface by electroless metal deposition the improvement which comprises contacting the resinous surface, prior to electroless metal deposition, with a composition comprising water, permanganate ion and manganate ion in the molar ratio of manganate ion to permanganate ion of up to 1.2, said composition having a pH in the range of 11 to 13.
Claim 3
Dependent Claim
35 words
A process as defined in claim 1 wherein the ratio of manganate ion to permanganate ion and the pH are controlled either (i) by buffering or (ii) by adding a pH adjustor semicontinuously or continuously.
Claim 4
Dependent Claim
13 words
A process as defined in claim 1 wherein the pH is about 12.5.
Claim 5
Dependent Claim
23 words
A process as defined in claim 1 wherein said contacting is effected at a temperature of from about 20° to about 100° C.
Claim 6
Dependent Claim
35 words
A process as defined in claim 4 wherein the content of the salt from which said permanganate ion is derived is in the range of from 1 gram per liter to 60 grams per liter.
Claim 7
Dependent Claim
23 words
A process as defined in claim 5 wherein said composition comprises from about 20 to about 50 grams per liter of potassium permanganate.
Claim 8
Dependent Claim
122 words
In a process for producing a securely bonded layer of metal on a resinous surface by electroless metal deposition the improvement which comprises contacting the resinous surface, prior to electroless metal deposition, with a composition comprising water, permanganate ion and manganate ion in the molar ratio of manganate ion to permanganate ion of up to 1.2 and a buffering agent in the range of from about 2 to about 60 grams per liter selected from the group consisting of phosphorus-containing compounds, boron-containing compounds, carbonate-containing compounds, bicarbonate-containing compounds and mixtures of the foregoing in an amount at least sufficient to maintain the molar ratio of manganate ion to permanganate ion and the pH of said composition within the range of 11 to 13.
Claim 9
Dependent Claim
122 words
In a process for producing a securely bonded layer of metal on a resinous surface by electroless metal deposition the improvement which comprises contacting the resinous surface, prior to electroless metal deposition, with a composition comprising water, permanganate ion and manganate ion in the molar ratio of manganate ion to permanganate ion of up to 1.2 and a buffering agent in the range of from about 2 to about 60 grams per liter selected from the group consisting of phosphorus-containing compounds, boron-containing compounds, carbonate-containing compounds, bicarbonate-containing compounds and mixtures of the foregoing in an amount at least sufficient to maintain the molar ratio of manganate ion to permanganate ion and the pH of said composition within the range of 11 to 13.
Claim 10
Dependent Claim
13 words
A process as defined in claim 7 wherein the pH is about 12.5.
Claim 11
Dependent Claim
22 words
A process as defined in claim 7 wherein said buffering agent content is from about 2 to about 60 grams per liter.
References Cited (Backward Citations)
US3598630A
Cited
US3652351A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-08-15 | 1981-02-14 | 1981-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-08-15 | 1985-02-14 | 1985-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-08-15 | 1989-02-14 | 1989-08-16 | $7700.00 | Window Closed / Lapsed |