US3558374A
Expired / Lapsed
US
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Polycrystalline film having controlled grain size and method of making same
Assignee: International Business Machines Corp
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Filing: 1968-01-15
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Granted: 1971-01-26
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Expires: 1988-01-15
Abstract
Abstract A FILM OF A POLYCRYSTALLINE MATERIAL IS DEPOSITED PYROLYTICALLY ON AN ELECTRICALLY INSULATING SURFACE OF A SUBSTRATE. BY CONTROLLING THE RATE OF DEPOSITION OF THE MATERIAL ON THE SUBSTRATE AND THE TEMPERATURE OF THE SUBSTRATE, THE GRAIN SIZE OF THE POLYCRYSTALLINE FILM IS REGULATED SO THAT PN JUNCTIONS HAVING A SHARP REVERSE BIASED BREAKDOWN MAY BE FORMED THEREIN.
Inventors
- 👤 David W Boss
- 👤 Ven Y Doo
- 👤 William N Patterson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:56
CPC Classifications
H; H10; H10D; H10D62/00; H10D62/40; C; C23; C23C; C23C16/00; H10D99/00; H10P; H10P95/00; Y; Y10; Y10S; Y10S148/00; Y10S148/085; Y10S148/122; Y10S148/15
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-25 | 1974-07-27 | 1975-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-25 | 1978-07-27 | 1979-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-25 | 1982-07-27 | 1983-01-26 | $7700.00 | Window Closed / Lapsed |