Electrolytic etch apparatus
Abstract
Abstract ELECTROLYTIC ETCH APPARATUS FOR PROCESSING ARTICLES HAVING A LAYER OF ALUMINUM THEREON COMPRISING A TANK ADAPTED TO CARRY AN ETCH SOLUTION WITH AN ELECTRODE ASSEMBLY MOUNTED IN THE TANK AND HAVING FIRST AND SECOND ELECTRODES DISPOSED IN THE ETCH SOLUTION. A BOAT ASSEMBLY ADAPTED TO CARRY A PLURALITY OF THE ARTICLES IS DISPOSED IN THE ETCH SOLUTION SO THAT THE ARTICLES ARE IN CONTACT WITH THE ETCH SOLUTION. THE BOAT ASSEMBLY IS PROVIDED WITH THE MEANS FOR MAKING INTIMATE ELECTRICAL CONTACT WITH EACH OF THE ARTICLES. THE ELECTRODE ASSEMBLY INCLUDES MEANS FOR MAKING CONTACT BETWEEN THE BOAT ASSEMBLY AND ONE OF THE ELECTRODES. A POWER SUPPLY IS CONNECTED TO THE ELECTRODES FOR CAUSING A CURRENT TO FLOW BETWEEN THE ELECTRODES AND THROUGH THE ETCH SOLUTION. THE ELECTRODE ASSEMBLY ALSO INCLUDES MEANS FOR PREVENTING THE FORMATION OF A SUBSTANTIAL NUMBER OF BUBBLES IN THE VICINITY OF THE ARTICLES SO THAT BUBBLES WILL NOT OCCLUDE CERTAIN AREAS OF THE ALUMINUM WHICH ARE TO BE REMOVED. IN THE METHOD, EXPOSED ALUMINUM CARRIED BY THE ARTICLES IS REMOVED ELECTROLYTICALLY UNTIL CERTAIN DISCONTINUITIES OCCUR IN THE ALUMINUM, AND THEREAFTER THE REMAINING ALUMINUM IS REMOVED CHEMICALLY.
Inventors
- 👤 Benjamin Hays Read
- 👤 Rexford E Black
Bibliographic Details
Claims Analysis
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1975-11-21 | 1976-05-22 | 1976-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-11-21 | 1980-05-22 | 1980-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-11-21 | 1984-05-22 | 1984-11-21 | $7700.00 | Window Closed / Lapsed |