Patent US3357902A successfully refreshed from Google Patents.
US3357902A
Expired / Lapsed
US
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Use of anodizing to reduce channelling on semiconductor material
Assignee: Fairchild Semiconductor Corp
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Filing: 1964-05-01
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Granted: 1967-12-12
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Expires: 1984-05-01
Abstract
No abstract record available.
Inventors
- 👤 Benjamini Eddi
- 👤 Edward F Duffek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:36
CPC Classifications
H; H10; H10P; H10P14/00; H10P14/60; H10P14/63; H10P14/6302; H10P14/6304; H10P14/6306; H10P14/6308; H10P14/6309; H10D; H10D99/00; H10P14/6324; Y; Y10; Y10S; Y10S148/00; Y10S148/043; Y10S205/00; Y10S205/917
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
96 words
IN THE PROCESS FOR MAKING DIFFUSED SILICON SEMICONDUCTOR DEVICES HAVING A PERMANENT SEMICONDUCTOR OXIDE COATING ON ONE SURFACE THEREOF, SAID PROCESS INCLUDING AT LEAST ONE DIFFUSING STEP WHICH RESULTS IN THE GROWTH OF A COATING OF OXIDE OF THE SEMICONDUCTOR MATERIAL ON SAID SURFACE, THE IMPROVEMENT WHICH COMPRISES REMOVING SAID GROWN OXIDE FROM SAID SURFACE OF SAID SEMICONDUCTOR MATERIAL BY ETCHING AND THEREAFTER ANODICALLY DEPOSITING IN A SUBSTANTIALLY NON-AQUEOUS ELECTROLYTE A NEW COATING OF AN OXIDE OF A SEMICONDUCTOR MATERIAL, THE NEW COATING HAVING MUCH LESS TENDENCY TO INDUCE THE FORMATION FO CHANNELS AT SAID SURFACE.
Claim 2
Dependent Claim
96 words
IN THE PROCESS FOR MAKING DIFFUSED SILICON SEMICONDUCTOR DEVICES HAVING A PERMANENT SEMICONDUCTOR OXIDE COATING ON ONE SURFACE THEREOF, SAID PROCESS INCLUDING AT LEAST ONE DIFFUSING STEP WHICH RESULTS IN THE GROWTH OF A COATING OF OXIDE OF THE SEMICONDUCTOR MATERIAL ON SAID SURFACE, THE IMPROVEMENT WHICH COMPRISES REMOVING SAID GROWN OXIDE FROM SAID SURFACE OF SAID SEMICONDUCTOR MATERIAL BY ETCHING AND THEREAFTER ANODICALLY DEPOSITING IN A SUBSTANTIALLY NON-AQUEOUS ELECTROLYTE A NEW COATING OF AN OXIDE OF A SEMICONDUCTOR MATERIAL, THE NEW COATING HAVING MUCH LESS TENDENCY TO INDUCE THE FORMATION FO CHANNELS AT SAID SURFACE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-12-11 | 1971-06-12 | 1971-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-12-11 | 1975-06-12 | 1975-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-12-11 | 1979-06-12 | 1979-12-12 | $7700.00 | Window Closed / Lapsed |