Patent US4825260A successfully refreshed from Google Patents.
US3296012A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electroless copper plating on ceramic material
Assignee: Corning Glass Works
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Filing: 1965-04-30
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Granted: 1967-01-03
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Expires: 1985-04-30
Abstract
No abstract record available.
Inventors
- 👤 Jr Stewart G Stalnecker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 08:28
CPC Classifications
C; C23; C23C; C23C18/00; C23C18/16; C23C18/18; C23C18/1851; C23C18/1872; C23C18/1886; C23C18/1893; C23C18/31; C23C18/38; C23C18/40; H; H05; H05K; H05K1/00; H05K1/02; H05K1/03; H05K1/0306; H05K3/00; H05K3/10; H05K3/18; H05K3/181; H05K3/38; H05K3/381
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
128 words
IN A METHOD OF CHEMICALLY DEPOSITING COPPER ON A SURFACE OF AN ALUMINA SUBSTRATE COMPRISING THE STEPS OF CLEANING SAID SUBSTRATE, SENSITIZING IT, RINSING IT WITH WATER AND IMMERSING IT IN A PLATING BATH, THE IMPROVEMENT COMPRISING THE STEPS OF MAKING THE SURFACE OF SAID ALUMINA SUBSTRATE SUBMICROSCOPICALLY POROUS BY LEACHING AFTER SAID CLEANING STEP IN A BATH COMPRISING ABOUT 85% AQUEOUS SOLUTION OF ORTHO-PHOSPHORIC ACID, SENSITIZING THE LEACHED SURFACE BY SUCCESSIVELY IMMERSING SAID SUBSTRATE IN AN AQUEOUS SOLUTION OF STANNOUS CHLORIDE AND AN AQUEOUS SOLUTIO OF PALLADIUM CHLORIDE FOR ABOUT 3 MINUTES EACH, AND THEN IMMERSING SAID SUBSTRATE IN A PLATING BATH CONTAINING A SALT OF COPPER TO WHICH BATH TETRASODIUM SALT OF ETHYLENEDIAMINETETRAACETIC ACID HAS BEEN ADDED IN THE AMOUNT OF AT LEAST 0.5% BY VOLUME.
Claim 2
Dependent Claim
128 words
IN A METHOD OF CHEMICALLY DEPOSITING COPPER ON A SURFACE OF AN ALUMINA SUBSTRATE COMPRISING THE STEPS OF CLEANING SAID SUBSTRATE, SENSITIZING IT, RINSING IT WITH WATER AND IMMERSING IT IN A PLATING BATH, THE IMPROVEMENT COMPRISING THE STEPS OF MAKING THE SURFACE OF SAID ALUMINA SUBSTRATE SUBMICROSCOPICALLY POROUS BY LEACHING AFTER SAID CLEANING STEP IN A BATH COMPRISING ABOUT 85% AQUEOUS SOLUTION OF ORTHO-PHOSPHORIC ACID, SENSITIZING THE LEACHED SURFACE BY SUCCESSIVELY IMMERSING SAID SUBSTRATE IN AN AQUEOUS SOLUTION OF STANNOUS CHLORIDE AND AN AQUEOUS SOLUTIO OF PALLADIUM CHLORIDE FOR ABOUT 3 MINUTES EACH, AND THEN IMMERSING SAID SUBSTRATE IN A PLATING BATH CONTAINING A SALT OF COPPER TO WHICH BATH TETRASODIUM SALT OF ETHYLENEDIAMINETETRAACETIC ACID HAS BEEN ADDED IN THE AMOUNT OF AT LEAST 0.5% BY VOLUME.
References Cited (Backward Citations)
US2690402A
Cited
US2872312A
Cited
US3119709A
Cited
US3075856A
Cited
US2968578A
Cited
US2956901A
Cited
US3042566A
Cited
US3093509A
Cited
US3095309A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-01-02 | 1970-07-04 | 1971-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-02 | 1974-07-04 | 1975-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-02 | 1978-07-04 | 1979-01-03 | $7700.00 | Window Closed / Lapsed |