US3220896A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transistor
Assignee: Raytheon Co
•
Filing: 1961-07-17
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Granted: 1965-11-30
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Expires: 1981-07-17
Abstract
No abstract record available.
Inventors
- 👤 Solomon L Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:01
CPC Classifications
H; H10; H10D; H10D99/00; H10D10/00; H10P; H10P14/00; H10P14/60; H10P14/61; H10P32/00; H10P95/00; H10P95/50; Y; Y10; Y10S; Y10S148/00; Y10S148/037; Y10S148/05; Y10S148/102; Y10S148/145; Y10S438/00; Y10S438/965
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
93 words
A JUNCTION TRANSISTOR COMPRISING A SEMICONDUCTOR BODY INCLUDING A COLLECTOR OF A FIRST RESISTIVITY, A BASE, AND AN EMITTER SEPARATED RESPECTIVELY BY COLLECTOR AND EMITTER JUNCTIONS, A LAYER OF SEMICONDUCTOR MATERIAL OF A SECOND RESISTIVITY BONDED TO THE COLLECTOR, SAID SECOND RESISTIVITY BEING LOWER THAN SAID FIRST RESISTIVITY, THE SECOND RESISTIVITY LAYER INCLUDING A MESA OPPOSITE THE EMITTER AND EXTENDING INTO THE COLLECTOR TOWARD THE COLLECTOR JUNCTION TO FORM A SUBSTANTIALLY LOWER RESISTIVITY PATH TO THE FLOW OF ELECTRIC CURRENT IN A DIRECTION PERPENDICULAR TO THE COLLECTOR JUNCTION THAN IN A TRANSVERSE DIRECTION.
Claim 2
Dependent Claim
93 words
A JUNCTION TRANSISTOR COMPRISING A SEMICONDUCTOR BODY INCLUDING A COLLECTOR OF A FIRST RESISTIVITY, A BASE, AND AN EMITTER SEPARATED RESPECTIVELY BY COLLECTOR AND EMITTER JUNCTIONS, A LAYER OF SEMICONDUCTOR MATERIAL OF A SECOND RESISTIVITY BONDED TO THE COLLECTOR, SAID SECOND RESISTIVITY BEING LOWER THAN SAID FIRST RESISTIVITY, THE SECOND RESISTIVITY LAYER INCLUDING A MESA OPPOSITE THE EMITTER AND EXTENDING INTO THE COLLECTOR TOWARD THE COLLECTOR JUNCTION TO FORM A SUBSTANTIALLY LOWER RESISTIVITY PATH TO THE FLOW OF ELECTRIC CURRENT IN A DIRECTION PERPENDICULAR TO THE COLLECTOR JUNCTION THAN IN A TRANSVERSE DIRECTION.
References Cited (Backward Citations)
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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) | 1968-11-29 | 1969-05-31 | 1969-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-29 | 1973-05-31 | 1973-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-29 | 1977-05-31 | 1977-11-30 | $7700.00 | Window Closed / Lapsed |