US3267294A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solid state light emissive diodes having negative resistance characteristics
Assignee: International Business Machines Corp
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Filing: 1963-11-26
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Granted: 1966-08-16
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Expires: 1983-11-26
Abstract
No abstract record available.
Inventors
- 👤 William P Dumke
- 👤 Ralph S Levitt
- 👤 Weiser Kurt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:50
CPC Classifications
H; H05; H05B; H05B33/00; H05B33/12; H05B33/14; H05B33/145; H10; H10F; H10F55/00; H10F55/10; H10F55/15; H10F55/155; H10H; H10H20/00; H10H20/80; H10P; H10P95/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
102 words
AN ELECTROLUMINESCENT DIODE HAVING A NEGATIVE RESISTANCE CHARACTERISTIC COMPRISING THREE ACTIVE REGIONS IN A HOST SEMICONDUCTOR BODY, A FIRST REGION BEING OF LOW RESISTIVITY AND HAVING SHALLOW LEVEL ACCEPTOR IMPURITIES THEREIN, A SECOND REGION CONTIGUOUS TO SAID FIRST REGION OF HIGH RESISTIVITY HAVING A DEEP LEVEL ACCEPTOR IMPURITY MATERIAL THEREIN, SAID DEEP LEVEL ACCEPTOR IMPURITY BEING CHARACTERIZED BY HAVING AN IONIZATION POTENTIAL AT LEAST TWICE THAT OF SAID SHALLOW LEVEL ACCEPTOR IMPURITY, A THIRD REGION CONTINGUOUS TO SAID SECOND REGION HAVING LOW RESISTIVITY AND HAVING SUITABLE DONOR IMPURITY MATERIAL THEREIN, AND MEANS FOR MAKING OHMIC CONTACT TO SAID FIRST AND THIRD REGIONS.
Claim 2
Dependent Claim
102 words
AN ELECTROLUMINESCENT DIODE HAVING A NEGATIVE RESISTANCE CHARACTERISTIC COMPRISING THREE ACTIVE REGIONS IN A HOST SEMICONDUCTOR BODY, A FIRST REGION BEING OF LOW RESISTIVITY AND HAVING SHALLOW LEVEL ACCEPTOR IMPURITIES THEREIN, A SECOND REGION CONTIGUOUS TO SAID FIRST REGION OF HIGH RESISTIVITY HAVING A DEEP LEVEL ACCEPTOR IMPURITY MATERIAL THEREIN, SAID DEEP LEVEL ACCEPTOR IMPURITY BEING CHARACTERIZED BY HAVING AN IONIZATION POTENTIAL AT LEAST TWICE THAT OF SAID SHALLOW LEVEL ACCEPTOR IMPURITY, A THIRD REGION CONTINGUOUS TO SAID SECOND REGION HAVING LOW RESISTIVITY AND HAVING SUITABLE DONOR IMPURITY MATERIAL THEREIN, AND MEANS FOR MAKING OHMIC CONTACT TO SAID FIRST AND THIRD REGIONS.
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) | 1969-08-15 | 1970-02-14 | 1970-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-15 | 1974-02-14 | 1974-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-15 | 1978-02-14 | 1978-08-16 | $7700.00 | Window Closed / Lapsed |