US3215862A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Semiconductor element in which negative resistance characteristics are produced throughout the bulk of said element
Assignee: International Business Machines Corp
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Filing: 1963-01-10
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Granted: 1965-11-02
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Expires: 1983-01-10
Abstract
No abstract record available.
Inventors
- 👤 Erlbach Erich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:57
CPC Classifications
H; H03; H03F; H03F3/00; H03F3/54; H03F3/04; H03F3/10; H10; H10N; H10N80/00; H10P; H10P95/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
96 words
MEANS FOR OBTAINING BULK NEGATIVE RESISTANCE CHARACTERISTICS FOR AN N-TYPE GENMANIUM CRYSTAL, THE LATTER HAVING FOUR MULTI-VALLEY CONDUCTION BANDS WHOSE CONSTANT ENERGY SURFACES ARE ELLIPSOIDS HAVING LARGE ELLIPTICITIES, MEANS FOR APPLYING UNIAXIAL MECHANICAL STRESS TO SAID CRYSTAL ALONG THE (011) AXIS SO AS TO NULLIFY THE NTERVALLEY TRANSFER OF ELECTRONS OF TWO OF SAID CONDUCTION BANDS BUT TO ENHANCE THE INTERVALLEY TRANSFER OF ELECTRONS BETWEEN THE OTHER TWO VALLEYS, MEANS FOR APPLYING A BIASING ELECTRIC FIELD ALONG THE (100 AXIS OF SAID CRYSTAL, WHEREBY NEGATIVE RESISTANCE CHARACTERISTICS ARE OBTAINED ALONG THE (011) AXIS OF SAID CRYSTAL.
Claim 2
Dependent Claim
96 words
MEANS FOR OBTAINING BULK NEGATIVE RESISTANCE CHARACTERISTICS FOR AN N-TYPE GENMANIUM CRYSTAL, THE LATTER HAVING FOUR MULTI-VALLEY CONDUCTION BANDS WHOSE CONSTANT ENERGY SURFACES ARE ELLIPSOIDS HAVING LARGE ELLIPTICITIES, MEANS FOR APPLYING UNIAXIAL MECHANICAL STRESS TO SAID CRYSTAL ALONG THE (011) AXIS SO AS TO NULLIFY THE NTERVALLEY TRANSFER OF ELECTRONS OF TWO OF SAID CONDUCTION BANDS BUT TO ENHANCE THE INTERVALLEY TRANSFER OF ELECTRONS BETWEEN THE OTHER TWO VALLEYS, MEANS FOR APPLYING A BIASING ELECTRIC FIELD ALONG THE (100 AXIS OF SAID CRYSTAL, WHEREBY NEGATIVE RESISTANCE CHARACTERISTICS ARE OBTAINED ALONG THE (011) AXIS OF SAID CRYSTAL.
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) | 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 |