US3341367A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for treating the surface of semiconductor devices
Assignee: Siemens and Halske AG
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Filing: 1963-04-23
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Granted: 1967-09-12
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Expires: 1983-04-23
Abstract
No abstract record available.
Inventors
- 👤 Beyerlein Fritz-Werner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 03:12
CPC Classifications
C; C23; C23C; C23C22/00; C23C22/02; H; H10; H10W; H10W74/00; H10W74/10; H10W74/131; Y; Y10; Y10S; Y10S438/00; Y10S438/906; Y10S438/974
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
50 words
THE METHOD OF TREATING THE SURFACE OF P-N JUNCTION SEMI-CONDUCTOR DEVICES FOR IMPROVING REVERSE-CURRENT STABILITY, WHICH COMPRISES ETCHING THE SEMICONDUCTOR SURFACE, IMMEDIATELY THEREAFTER CONTACTING THE ETCHED SEMICONDUCTOR WITH SUBSTANCE SELECTED FROM THE GROUP CONSISTING OF DERIVATIVES OF QUINOID AND KETOID RING COMPOUNDS HAVING AN OH-GROUP IN 2-POSITION OF THE >C=OGROUPING.
Claim 2
Independent Claim
50 words
THE METHOD OF TREATING THE SURFACE OF P-N JUNCTION SEMI-CONDUCTOR DEVICES FOR IMPROVING REVERSE-CURRENT STABILITY, WHICH COMPRISES ETCHING THE SEMICONDUCTOR SURFACE, IMMEDIATELY THEREAFTER CONTACTING THE ETCHED SEMICONDUCTOR WITH SUBSTANCE SELECTED FROM THE GROUP CONSISTING OF DERIVATIVES OF QUINOID AND KETOID RING COMPOUNDS HAVING AN OH-GROUP IN 2-POSITION OF THE >C=OGROUPING.
References Cited (Backward Citations)
US3160520A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-09-11 | 1971-03-13 | 1971-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-11 | 1975-03-13 | 1975-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-11 | 1979-03-13 | 1979-09-12 | $7700.00 | Window Closed / Lapsed |