US3184347A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Selective control of electron and hole lifetimes in transistors
Assignee: Fairchild Semiconductor Corp
•
Filing: 1962-07-19
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Granted: 1965-05-18
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Expires: 1982-07-19
Abstract
No abstract record available.
Inventors
- 👤 Jean A Hoerni
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:29
CPC Classifications
H; H10; H10D; H10D10/00; G; G01; G01R; G01R31/00; G01R31/26; H04; H04R; H04R23/00; H10D62/00; H10D62/60; H10D62/80; H10D62/83; H10D62/834; H10D99/00; H10P; H10P32/00; H10P95/00; H10P95/50; Y; Y10; Y10S; Y10S148/00; Y10S148/062; Y10S438/00; Y10S438/904
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
62 words
AN IMPROVED NPN SILICON TRANSISTOR STRUCTURE COMPRISING AN N-TYPE COLLECTOR, A P-TYPE BASE, AN N-TYPE EMITTER, AND GOLD DISPERSED SUBSTANTIALLY UNIFORMLY THROUGHOUT THE TRANSISTOR STRUCTURE WITH A CONCENTRATION THROUGHOUT THE REGION OF THE COLLECTOR ADJACENT TO THE COLLECTOR-BASE JUNCTION OF THE ORDER OF THE CONCENTRATION FOR COMPENSATION OF THE COLLECTOR, WHEREBY THE TRANSISTOR HAS A MINIMUM SWITCHING TIME AND HIGH CURRENT GAIN.
Claim 2
Dependent Claim
62 words
AN IMPROVED NPN SILICON TRANSISTOR STRUCTURE COMPRISING AN N-TYPE COLLECTOR, A P-TYPE BASE, AN N-TYPE EMITTER, AND GOLD DISPERSED SUBSTANTIALLY UNIFORMLY THROUGHOUT THE TRANSISTOR STRUCTURE WITH A CONCENTRATION THROUGHOUT THE REGION OF THE COLLECTOR ADJACENT TO THE COLLECTOR-BASE JUNCTION OF THE ORDER OF THE CONCENTRATION FOR COMPENSATION OF THE COLLECTOR, WHEREBY THE TRANSISTOR HAS A MINIMUM SWITCHING TIME AND HIGH CURRENT GAIN.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-05-17 | 1968-11-16 | 1969-05-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-05-17 | 1972-11-16 | 1973-05-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-05-17 | 1976-11-16 | 1977-05-18 | $7700.00 | Window Closed / Lapsed |