US3553536A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Semiconductor rectifiers having controlled storage and recovery characteristics
Assignee: RCA Corp
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Filing: 1968-11-19
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Granted: 1971-01-05
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Expires: 1988-11-19
Abstract
Abstract IN SEMICONDUCTOR RECTIFIERS COMPRISING TWO HEAVILY DOPED REGIONS OF N AND P CONDUCTIVITY CONTIGUOUS TO AND SEPARATED BY A BASE REGION, DIFFERENT RECTIFIERS HAVING VARIOUS COMBINATIONS OF STORAGE TIME AND SWITCHING RECOVERY RATE ARE OBTAINED BY VARIOUS COMBINATIONS OF CERTAIN ONES OF THE PHYSICAL PARAMETERS OF THE DEVICES, SUCH AS T HE DOPING CONCENTRATIONS AT THE JUNCTIONS OF THE DEVICE, THE TYPE AND RESISTIVITY OF THE BASE REGION, AND THE USE OF CARRIER LIFETIME REDUCING DOPING MATERIALS.
Inventors
- 👤 John M S Neilson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:21
CPC Classifications
H; H10; H10D; H10D8/00; H10D8/50; H10D62/00; H10D62/10; H10D62/117
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) | 1974-01-04 | 1974-07-06 | 1975-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-04 | 1978-07-06 | 1979-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-04 | 1982-07-06 | 1983-01-05 | $7700.00 | Window Closed / Lapsed |