US3733222A
Expired / Lapsed
US
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Method of removing inversion layers from semiconductor bodies of p-type conductivity
Assignee: Telefunken Electronic GmbH
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Filing: 1970-09-22
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Granted: 1973-05-15
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Expires: 1990-09-22
Abstract
Abstract A METHOD OF REMOVING INVERSION LAYERS FROM THE SURFACE OF HIGH RESISTANCE SEMICONDUCTOR REGIONS OF PTYPE CONDUCTIVITY WHICH BORDER, IN A SEMICONDUCTOR BODY, ON A SEMICONDUCTOR REGION OF N-TYPE CONDUCTIVIGY AND ARE COVERED WITH AN OXIDE MASKING LAYER. THE METHOD ESSENTIALLY COMPRISES IRRADIATING THE SEMICONDUCTOR BODY WITH NEUTRONS.
Inventors
- 👤 H Schiller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:38
CPC Classifications
H; H10; H10F; H10F30/00; H10F30/20; H10F30/21; H10F30/22; H10F30/221; H10F99/00; H10D; H10D62/00; H10D62/10; H10D99/00; H10F71/00; H10F71/134; H10P; H10P34/00; H10P95/00; Y; Y10; Y10S; Y10S148/00; Y10S148/165
Claims Analysis
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References Cited (Backward Citations)
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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) | 1976-05-14 | 1976-11-13 | 1977-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-14 | 1980-11-13 | 1981-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-14 | 1984-11-13 | 1985-05-15 | $7700.00 | Window Closed / Lapsed |