Patent US2457202A successfully refreshed from Google Patents.
US3669730A
Expired / Lapsed
US
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Modifying barrier layer devices
Assignee: Berkeley Heights
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Filing: 1970-04-24
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Granted: 1972-06-13
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Expires: 1990-04-24
Abstract
Abstract A METHOD IS DESCRIBED FOR PRODUCING SURFACE BARRIER DIODES WITH PREDETERMINED BARRIER HEIGHTS. AT LEAST TWO METALS ARE MIXED IN A PREDETERMINED PROPORTION AND DEPOSITED ON A SILICON SUBSTRATE. SUFFICIENT HEAT IS APPLIED TO CAUSE THE METALS TO REACT WITH THE SUBSTRATE, FORMING A MIXED METAL SILICIDE REGION. BY VARYING THE PROPORTIONS OF THE METALS A DESIRED BARRIER HEIGHT CAN BE ACHEIVED.
Inventors
- 👤 Martin Paul Lepselter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 02:28
CPC Classifications
H; H10; H10D; H10D99/00; H10D64/00; H10D64/60; H10D64/64; H10P; H10P95/00
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) | 1975-06-13 | 1975-12-13 | 1976-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-13 | 1979-12-13 | 1980-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-13 | 1983-12-13 | 1984-06-13 | $7700.00 | Window Closed / Lapsed |