US3215908A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Quantum mechanical tunneling semiconductor device
Assignee: International Business Machines Corp
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Filing: 1961-06-23
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Granted: 1965-11-02
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Expires: 1981-06-23
Abstract
No abstract record available.
Inventors
- 👤 John C Marinace
- 👤 Richard F Rutz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 01:12
CPC Classifications
H; H10; H10D; H10D62/00; H10D62/60; H10D62/80; H10D62/83; H10D62/834; H10D8/00; H10D8/70; H10D99/00; H10P; H10P95/00; H10P95/50
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
88 words
A SOLID STATE QUANTUM MECHANICAL TUNNELING SEMICONDUCTOR DEVICE HAVING A SUBSTANTIALLY VOLTAGE INDEPENDENT REGION BETWEEN A FIRST POSITIVE RESISTANCE REGION AND A SECOND NEGATIVE RESISTANCE REGION OF ITS E-I OUTPUT CHARACTERISTIC COMPRISING A MONOCRYSTALLINE GERMANIUM BODY MEMBER HAVING A P-N JUNCTION THEREIN WHEREIN THE DOPING LEVEL OF AT LEAST ONE OF THE CONDUCTIVITY TYPE DETERMINING IMPURITIES IS BETWEEN ABOUT 2 AND 8X10**20 ATOMS PER CC. OF GERMANIUM AND WHEREIN THE DOPING LEVEL OF THE OTHER CONDUCTIVITY TYPE DETERMINING IMPURITY IS AT LEAST 2X10**19 ATOMS PER CC. OF GERMANIUM.
Claim 2
Dependent Claim
88 words
A SOLID STATE QUANTUM MECHANICAL TUNNELING SEMICONDUCTOR DEVICE HAVING A SUBSTANTIALLY VOLTAGE INDEPENDENT REGION BETWEEN A FIRST POSITIVE RESISTANCE REGION AND A SECOND NEGATIVE RESISTANCE REGION OF ITS E-I OUTPUT CHARACTERISTIC COMPRISING A MONOCRYSTALLINE GERMANIUM BODY MEMBER HAVING A P-N JUNCTION THEREIN WHEREIN THE DOPING LEVEL OF AT LEAST ONE OF THE CONDUCTIVITY TYPE DETERMINING IMPURITIES IS BETWEEN ABOUT 2 AND 8X10**20 ATOMS PER CC. OF GERMANIUM AND WHEREIN THE DOPING LEVEL OF THE OTHER CONDUCTIVITY TYPE DETERMINING IMPURITY IS AT LEAST 2X10**19 ATOMS PER CC. OF GERMANIUM.
References Cited (Backward Citations)
US3033714A
Cited
US3018423A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-11-01 | 1969-05-03 | 1969-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-01 | 1973-05-03 | 1973-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-01 | 1977-05-03 | 1977-11-02 | $7700.00 | Window Closed / Lapsed |