US3121809A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Semiconductor device utilizing majority carriers with thin metal base between semiconductor materials
Assignee: AT&T Inc
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Filing: 1961-09-25
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Granted: 1964-02-18
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Expires: 1981-09-25
Abstract
No abstract record available.
Inventors
- 👤 Martin M Atalla
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 03:11
CPC Classifications
H; H10; H10D; H10D48/00; H10D48/30; H10D48/32; H01; H01J; H01J1/00; H01J1/02; H01J1/30; H01J1/308; H10D10/00; H10D62/00; H10D62/10; H10D99/00; Y; Y10; Y10S; Y10S148/00; Y10S148/142
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
111 words
IN COMBINATION, A DEVICE INCLUDING FIRST AND THIRD LAYERS SPACED APART BY A SECOND LAYER, SAID FIRST AND THIRD LAYERS COMPRISING SEMICONDUCTOR MATERIAL OF LIKE CONDUCTIVITY TYPE, SAID SECOND LAYER COMPRISING METALLIC MATERIAL FOR FORMING FIRST AND SECOND RECTIFYING BARRIERS WITH SAID FIRST AND THIRD LAYERS RESPECTIVELY, SEPARATE LOW RESISTANCE CONTACTS TO EACH OF SAID LAYERS, MEANS FOR FORWARD BIASING SAID FIRST RECTIFYING BARRIER FOR INJECTING CHARGE CARRIERS INTO SAID SECOND LAYER, MEANS FOR REVERSE BIASING SAID SECOND BARRIER FOR COLLECTING THE CHARGE CARRIERS, AND A SIGNAL MEANS FOR CONTROLLING THE FLOW OF SAID CHARGE CARRIERS, SAID SECOND LAYER BEING SUFFICIENTLY THIN TO ENABLE THE COLLECTION OF THE INJECTED CHARGE CARRIERS.
Claim 2
Dependent Claim
111 words
IN COMBINATION, A DEVICE INCLUDING FIRST AND THIRD LAYERS SPACED APART BY A SECOND LAYER, SAID FIRST AND THIRD LAYERS COMPRISING SEMICONDUCTOR MATERIAL OF LIKE CONDUCTIVITY TYPE, SAID SECOND LAYER COMPRISING METALLIC MATERIAL FOR FORMING FIRST AND SECOND RECTIFYING BARRIERS WITH SAID FIRST AND THIRD LAYERS RESPECTIVELY, SEPARATE LOW RESISTANCE CONTACTS TO EACH OF SAID LAYERS, MEANS FOR FORWARD BIASING SAID FIRST RECTIFYING BARRIER FOR INJECTING CHARGE CARRIERS INTO SAID SECOND LAYER, MEANS FOR REVERSE BIASING SAID SECOND BARRIER FOR COLLECTING THE CHARGE CARRIERS, AND A SIGNAL MEANS FOR CONTROLLING THE FLOW OF SAID CHARGE CARRIERS, SAID SECOND LAYER BEING SUFFICIENTLY THIN TO ENABLE THE COLLECTION OF THE INJECTED CHARGE CARRIERS.
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) | 1967-02-17 | 1967-08-19 | 1968-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-02-17 | 1971-08-19 | 1972-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-02-17 | 1975-08-19 | 1976-02-18 | $7700.00 | Window Closed / Lapsed |