Patent US3379940A successfully refreshed from Google Patents.
US3379940A
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Integrated symmetrical conduction device
Assignee: NEC Corp
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Filing: 1965-01-21
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Granted: 1968-04-23
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Expires: 1985-01-21
Abstract
No abstract record available.
Inventors
- 👤 Nakao Hideo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:45
CPC Classifications
H; H10; H10D; H10D84/00; H10D84/60; H10D84/611; H10D84/613; H10D84/617
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
116 words
A SYMMETRICAL TRANSISTOR DEVICE COMPRISING A SEMICONDUCTOR WAFER HAVING A FIRST CONDUCTIVITY TYPE, FIRST AND SECOND TRANSISTORS OF THE SAME CONDUCTIVITY TYPE FORMED IN SAID WAFER AND SPACED FROM EACH OTHER THEREIN, EACH OF SAID TRANSISTORS HAVING A COLLECTOR REGION OF A SECOND CONDUCTIVITY TYPE, A BASE REGION OF SAID FIRST CONDUCTIVITY TYPE AND AN EMITTER REGION OF SAID SECOND CONDUCTIVITY TYPE, A FIRST DIODE REGION OF SAID FIRST CONDUCTIVITY TYPE FORMED IN THE COLLECTOR REGION OF SAID FIRST TRANSISTOR, SAID FIRST DIODE REGION FORMING A FIRST DIODE WITH THE COLLECTOR REGION IN WHICH IT IS FORMED, A SECOND DIODE REGION ALSO OF SAID FIRST CONDUCTIVITY TYPE FORMED IN THE COLLECTOR REGION OF SAID SECOND TRANSISTOR,
Claim 2
Dependent Claim
116 words
A SYMMETRICAL TRANSISTOR DEVICE COMPRISING A SEMICONDUCTOR WAFER HAVING A FIRST CONDUCTIVITY TYPE, FIRST AND SECOND TRANSISTORS OF THE SAME CONDUCTIVITY TYPE FORMED IN SAID WAFER AND SPACED FROM EACH OTHER THEREIN, EACH OF SAID TRANSISTORS HAVING A COLLECTOR REGION OF A SECOND CONDUCTIVITY TYPE, A BASE REGION OF SAID FIRST CONDUCTIVITY TYPE AND AN EMITTER REGION OF SAID SECOND CONDUCTIVITY TYPE, A FIRST DIODE REGION OF SAID FIRST CONDUCTIVITY TYPE FORMED IN THE COLLECTOR REGION OF SAID FIRST TRANSISTOR, SAID FIRST DIODE REGION FORMING A FIRST DIODE WITH THE COLLECTOR REGION IN WHICH IT IS FORMED, A SECOND DIODE REGION ALSO OF SAID FIRST CONDUCTIVITY TYPE FORMED IN THE COLLECTOR REGION OF SAID SECOND TRANSISTOR,
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) | 1971-04-23 | 1971-10-23 | 1972-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-04-23 | 1975-10-23 | 1976-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-04-23 | 1979-10-23 | 1980-04-23 | $7700.00 | Window Closed / Lapsed |