Patent US3265990A successfully refreshed from Google Patents.
US3265990A
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Stimulated emission of radiation in semiconductor devices
Assignee: International Business Machines Corp
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Filing: 1962-10-15
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Granted: 1966-08-09
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Expires: 1982-10-15
Abstract
No abstract record available.
Inventors
- 👤 Burns Gerald
- 👤 Frederick H Dill
- 👤 William P Dumke
- 👤 Gordon J Lasher
- 👤 Marshall I Nathan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:26
CPC Classifications
H; H01; H01S; H01S5/00; H01S5/30; H01S5/32; H01S5/02; H01S5/024; H01S5/02407; H01S5/02423
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
113 words
APPARATUS EXHIBITING STIMULATED EMISSION OF RADIATION COMPRISING: A BODY OF SEMICONDUCTOR MATERIAL HAVING A DIRECT BAND GAP AND EXHIBITING A STRONG DIRECT RADIATIVE TRANSITION IN THE VICINITY OF SAID BAND GAP INVOLVING AN ENERGY LESS THAN THAT NECESSARY TO MOVE A CURRENT CARRIER FROM THE CONDUCTION BAND TO THE VALENCE BAND; AND MEANS INCLUDING A P-N JUNCTION IN SAID BODY AND CURRENT SUPPLY MEANS COUPLED TO SAID JUNCTION FOR FORWARD BIASING SAID JUNCTION TO INJECT ELECTRICAL CURRENT CARRIERS INTO SAID BODY IN EXCESS OF A THRESHOLD DENSITY TO PRODUCE STIMULATED EMISSION OF RADIATION AT SAID ENERGY LESS THAN THAT NECESSARY TO MOVE A CURRENT CARRIER FROM THE CONDUCTION BAND TO THE VALENCE BAND.
Claim 2
Dependent Claim
113 words
APPARATUS EXHIBITING STIMULATED EMISSION OF RADIATION COMPRISING: A BODY OF SEMICONDUCTOR MATERIAL HAVING A DIRECT BAND GAP AND EXHIBITING A STRONG DIRECT RADIATIVE TRANSITION IN THE VICINITY OF SAID BAND GAP INVOLVING AN ENERGY LESS THAN THAT NECESSARY TO MOVE A CURRENT CARRIER FROM THE CONDUCTION BAND TO THE VALENCE BAND; AND MEANS INCLUDING A P-N JUNCTION IN SAID BODY AND CURRENT SUPPLY MEANS COUPLED TO SAID JUNCTION FOR FORWARD BIASING SAID JUNCTION TO INJECT ELECTRICAL CURRENT CARRIERS INTO SAID BODY IN EXCESS OF A THRESHOLD DENSITY TO PRODUCE STIMULATED EMISSION OF RADIATION AT SAID ENERGY LESS THAN THAT NECESSARY TO MOVE A CURRENT CARRIER FROM THE CONDUCTION BAND TO THE VALENCE BAND.
References Cited (Backward Citations)
US3121203A
Cited
US3059117A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-08-08 | 1970-02-07 | 1970-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-08 | 1974-02-07 | 1974-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-08 | 1978-02-07 | 1978-08-09 | $7700.00 | Window Closed / Lapsed |