US3260902A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Monocrystal transistors with region for isolating unit
Assignee: Fairchild Semiconductor Corp
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Filing: 1964-06-10
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Granted: 1966-07-12
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Expires: 1984-06-10
Abstract
No abstract record available.
Inventors
- 👤 Porter Edwin Herbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:37
CPC Classifications
H; H10; H10D; H10D84/00; H10D84/01; H10D99/00; H10P; H10P95/00; H10W; H10W10/00; H10W10/01; H10W10/031; H10W10/30; H10W15/00; H10W15/01; Y; Y10; Y10S; Y10S148/00; Y10S148/037; Y10S148/062; Y10S148/085; Y10S148/145; Y10S148/151; Y10S257/00; Y10S257/918
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
77 words
AN IMPROVED ISOLATED EPITAXIAL TRANSISTOR COMPRISING A BODY OF SEMICONDUCTOR MATERIAL INCLUDING AN EMITTER, A BASE, AND A COLLECTOR REGION; AND A FOURTH REGION ADJACENT TO SAID COLLECTOR REGION OF THE SAME CONDUCTIVITY TYPE AS SAID COLLECTOR REGION AND HAVING A LOWER RESISTIVITY AND LESSER LATERAL EXTENT THAN SAID COLLECTOR REGION; AND AN ISOLATING REGION SURROUNDING SAD TRANSITOR OF THE OPPOSITE CONDUCTIVITY TYPE FROM SAID COLLECTOR REGION, A PART OF WHICH IS ADJACENT TO SAID FOURTH REGION.
Claim 2
Dependent Claim
77 words
AN IMPROVED ISOLATED EPITAXIAL TRANSISTOR COMPRISING A BODY OF SEMICONDUCTOR MATERIAL INCLUDING AN EMITTER, A BASE, AND A COLLECTOR REGION; AND A FOURTH REGION ADJACENT TO SAID COLLECTOR REGION OF THE SAME CONDUCTIVITY TYPE AS SAID COLLECTOR REGION AND HAVING A LOWER RESISTIVITY AND LESSER LATERAL EXTENT THAN SAID COLLECTOR REGION; AND AN ISOLATING REGION SURROUNDING SAD TRANSITOR OF THE OPPOSITE CONDUCTIVITY TYPE FROM SAID COLLECTOR REGION, A PART OF WHICH IS ADJACENT TO SAID FOURTH REGION.
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) | 1969-07-11 | 1970-01-10 | 1970-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-07-11 | 1974-01-10 | 1974-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-07-11 | 1978-01-10 | 1978-07-12 | $7700.00 | Window Closed / Lapsed |