Methods for electroless plating and for brazing
Abstract
Abstract A METHOD FOR BRAZING COMPRISING METALLIZING THE SURFACE OF AN INSULATING OR SEMICONDUCTINGMEMBER, ELECTROLESSLY PLATING THE METALLIZED SURFACE WITH A COBALTCOPPER ALLOY, AND THEN BRAZING A METALLIC MEMBER TO THE PLATED SURFACE. THE PRESENCE OF THIS COBALT-COPPER PLATING IMPROVES THE WETTABILITY OF THE SURFACE AND REDUCES THE PENETRATION OF THE BRAZE THROUGH THE METALLIZING. THE STEP OF ELECTROLESSLY PLATING INCLUDES CONTACTING THE METALLIZED SURFACE WITH AN AQUEOUS SOLUTION CONTAINING COBALT AND COPPER IONS, A REDUCING AGENT FOR THESE IONS, A SOLUBLE BASE, AND A COMPLEXING AGENT. THE ELECTROLESS PLATING METHOD HAS THE ADVANTAGE THAT IT IS SELF-INITIATING IN THE PRESENCE OF MOST ELECTRICAL CONDUCTORS.
Inventors
- 👤 Robert W Etter
Bibliographic Details
Claims Analysis
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1974-01-04 | 1974-07-06 | 1975-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-04 | 1978-07-06 | 1979-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-04 | 1982-07-06 | 1983-01-05 | $7700.00 | Window Closed / Lapsed |