US3428870A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Semiconductor devices
Assignee: General Electric Co
•
Filing: 1965-07-29
•
Granted: 1969-02-18
•
Expires: 1985-07-29
Abstract
No abstract record available.
Inventors
- 👤 Calvin M Davis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 07:04
CPC Classifications
H; H10; H10D; H10D62/00; H10D62/60; H10D18/00; H10D62/10; H10D62/17; H10D99/00; H10P; H10P10/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
100 words
A SEMICONDUCTOR DEVICE INCLUDING A SEMICONDUCTOR BODY HAVING AT LEAST FIRST AND SECOND LAYERS OF OPPOSITE CONDUCTIVITY TYPE CONTIGUOUS WITH AND SEPARATED BY A THIRD LAYER, SAID THIRD LAYER BEING OF UNIFORM THICKNESS, IN PARALLEL RELATION WITH SAID FIRST LAYER AND SAID SECOND LAYER ALONG THEIR CONTIGUOUS PLANES, AND HAVING FIRST AND SECOND ZONES EACH CONTIGUOUS WITH SAID FIRST AND SECOND LAYERS, SAID FIRST ZONE COMPRISING A CENTRAL PART OF SAID THIRD LAYER AND SAID SECOND ZONE COMPRISING A PERIPHERAL PART OF SAID THIRD LAYER SURROUNDING SAID FIRST ZONE, SAID SECOND ZONE HAVING A HIGHER RESISTIVITY THAN SAID FIRST ZONE.
Claim 2
Dependent Claim
100 words
A SEMICONDUCTOR DEVICE INCLUDING A SEMICONDUCTOR BODY HAVING AT LEAST FIRST AND SECOND LAYERS OF OPPOSITE CONDUCTIVITY TYPE CONTIGUOUS WITH AND SEPARATED BY A THIRD LAYER, SAID THIRD LAYER BEING OF UNIFORM THICKNESS, IN PARALLEL RELATION WITH SAID FIRST LAYER AND SAID SECOND LAYER ALONG THEIR CONTIGUOUS PLANES, AND HAVING FIRST AND SECOND ZONES EACH CONTIGUOUS WITH SAID FIRST AND SECOND LAYERS, SAID FIRST ZONE COMPRISING A CENTRAL PART OF SAID THIRD LAYER AND SAID SECOND ZONE COMPRISING A PERIPHERAL PART OF SAID THIRD LAYER SURROUNDING SAID FIRST ZONE, SAID SECOND ZONE HAVING A HIGHER RESISTIVITY THAN SAID FIRST ZONE.
References Cited (Backward Citations)
US2792540A
Cited
US3012305A
Cited
US3034079A
Cited
US3260902A
Cited
US3287182A
Cited
US3312881A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-02-18 | 1972-08-19 | 1973-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-18 | 1976-08-19 | 1977-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-18 | 1980-08-19 | 1981-02-18 | $7700.00 | Window Closed / Lapsed |