Method of manufacturing semiconductor containers
Abstract
Abstract THIS METHOD OF MANUFACTURING A SEMICONDUCTOR CONTAINER WHICH IS COMPRISED OF A CYLINDRICAL METAL CAN HAVING A GLASS WINDOW AT ONE END INVOLVES THE STEPS OF PLACING A SOLID GLASS PREFORM IN AN OPEN ENDED METAL CAN AND CAUSING THE SOLID GLASS PREFORM TO BECOME MOLTEN GLASS BY PLACING THE METAL CAN IN A HEATED ATMOSPHERE. THE CAN WITH THE SOLID GLASS PREFORM IS PLACED IN A MOULD JIG IN WHICH THE JIG HAS A LENS FORMED CAVITY AT ITS BASE SO THAT WHEN THE GLASS BECOMES MOLTEN IT WILL FLOW INTO THE CAVITY TO FORM THE PROPER WINDOW. AFTER THE COMBINA- TION IS COOLED A HERMETIC SEAL IS ESTABLISHED BETWEEN THE GLASS AND THE METAL CAN. SUBSEQUENTLY THE GLASS WINDOW IS REHEATED TO A TEMPERATURE ABOVE THE SOFTENING TEMPERATURE OF GLASS AND BELOW THE WORKING TEMPERATURE SO THAT IT MAY BECOME THERMALLY POLISHED.
Inventors
- 👤 Christopher Robert Combes
- 👤 Geoffrey William Scholes
Bibliographic Details
Claims Analysis
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-05-31 | 1974-11-30 | 1975-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-31 | 1978-11-30 | 1979-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-31 | 1982-11-30 | 1983-06-01 | $7700.00 | Window Closed / Lapsed |