US3239393A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for producing semiconductor articles
Assignee: International Business Machines Corp
•
Filing: 1962-12-31
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Granted: 1966-03-08
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Expires: 1982-12-31
Abstract
No abstract record available.
Inventors
- 👤 Jr Frederick H Dill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:19
CPC Classifications
C; C30; C30B; C30B31/00; C30B31/06; C30B31/16; C30B31/165; H; H10; H10P; H10P95/00; Y; Y10; Y10S; Y10S252/00; Y10S252/95; Y10S252/951
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
44 words
A METHOD FOR PRODUCING SEMICONDUCTOR DEVICES BY VAPOR DIFFUSION COMPRISING HEATING A GALLIUM ARSENIDE SUBSTRATE CRYSTAL IN AN EVACUATED CHAMBER TOGETHER WITH A CHARGE OF A COMPOUND SELECTED FROM THE CLASS INCLUDING ZINC ARSENIDE AND CADMIUM ARSENIDE TO SERVE AS A SOURCE OF DIFFUSANT.
Claim 2
Independent Claim
44 words
A METHOD FOR PRODUCING SEMICONDUCTOR DEVICES BY VAPOR DIFFUSION COMPRISING HEATING A GALLIUM ARSENIDE SUBSTRATE CRYSTAL IN AN EVACUATED CHAMBER TOGETHER WITH A CHARGE OF A COMPOUND SELECTED FROM THE CLASS INCLUDING ZINC ARSENIDE AND CADMIUM ARSENIDE TO SERVE AS A SOURCE OF DIFFUSANT.
References Cited (Backward Citations)
US2928761A
Cited
US2868678A
Cited
US2846340A
Cited
US2929859A
Cited
US2900286A
Cited
US3096219A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-03-07 | 1969-09-06 | 1970-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-07 | 1973-09-06 | 1974-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-07 | 1977-09-06 | 1978-03-08 | $7700.00 | Window Closed / Lapsed |