Patent US2689289A successfully refreshed from Google Patents.
Patent US3008089A successfully refreshed from Google Patents.
US3008089A
Expired / Lapsed
US
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Semiconductive device comprising p-i-n conductivity layers
Assignee: AT&T Inc
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Filing: 1958-02-20
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Granted: 1961-11-07
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Expires: 1978-02-20
Abstract
No abstract record available.
Inventors
- 👤 Jr Arthur Uhlir
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:36
CPC Classifications
H; H03; H03F; H03F7/00; H03F7/04; H10; H10D; H10D99/00; H10P; H10P95/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
95 words
SEMICONDUCTIVE APPARATUS COMPRISING A WAVEGUIDING MEDIUM CONSISTING OF A SEMICONDUCTIVE WAFER HAVING A PAIR OF OPPOSED MAJOR FACES OF WHICH ONE IS PLANAR AND THE OTHER INCLUDES AT LEAST ONE INDENTATION FOR FORMING A DIMPLED REGION OF REDUCED SEPARATION BETWEEN SAID MAJOR FACES, THE BULK OF THE WAFER BEING SUBSTANTIALLY INTRINSIC, AND EACH OF THE MAJOR FACES INCLUDING A CONTINUOUS LAYER OF HIGH CONDUCTIVITY, THE CONDUCTIVITY TYPES OF THE OPPOSED LAYERS BEING OPPOSITE AND THE HIGH CONDUCTIVITY LAYERS BEING CONTIGUOUS AT THE DIMPLED REGION FOR FORMING THERE A P-N JUNCTION ENCLOSED BY AN N-I-P REGION.
Claim 2
Dependent Claim
95 words
SEMICONDUCTIVE APPARATUS COMPRISING A WAVEGUIDING MEDIUM CONSISTING OF A SEMICONDUCTIVE WAFER HAVING A PAIR OF OPPOSED MAJOR FACES OF WHICH ONE IS PLANAR AND THE OTHER INCLUDES AT LEAST ONE INDENTATION FOR FORMING A DIMPLED REGION OF REDUCED SEPARATION BETWEEN SAID MAJOR FACES, THE BULK OF THE WAFER BEING SUBSTANTIALLY INTRINSIC, AND EACH OF THE MAJOR FACES INCLUDING A CONTINUOUS LAYER OF HIGH CONDUCTIVITY, THE CONDUCTIVITY TYPES OF THE OPPOSED LAYERS BEING OPPOSITE AND THE HIGH CONDUCTIVITY LAYERS BEING CONTIGUOUS AT THE DIMPLED REGION FOR FORMING THERE A P-N JUNCTION ENCLOSED BY AN N-I-P REGION.
References Cited (Backward Citations)
US2689930A
Cited
US2887627A
Cited
US2816228A
Cited
US2840497A
Cited
US2820154A
Cited
US2770761A
Cited
US2790940A
Cited
US2760013A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-11-06 | 1965-05-08 | 1965-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-11-06 | 1969-05-08 | 1969-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-11-06 | 1973-05-08 | 1973-11-07 | $7700.00 | Window Closed / Lapsed |