Patent US3207939A successfully refreshed from Google Patents.
US3207939A
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Semiconductive electroluminescent devices
Assignee: Ferranti International PLC
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Filing: 1962-10-11
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Granted: 1965-09-21
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Expires: 1982-10-11
Abstract
No abstract record available.
Inventors
- 👤 Mason David Eric
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:59
CPC Classifications
H; H10; H10H; H10H20/00; H10H20/80; H10H20/81; H10H20/811; H10H20/822; H10H20/823; H10P; H10P10/00; H10P10/12; H10P95/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
81 words
AN ELECTROLUMINESCENT DEVICE COMPRISING A SINGLE CRYSTAL LAYER OF AN ELECTROLUMINESCENT MATERIAL ON A SINGLE CRYSTAL SUBSTRATE OF A P-TYPE SEMICONDUCTOR MATERIAL HAVING SUBSTANTIALLY THE SAME CRYSTAL STRUCTURE AS SAID ELECTROLUMINESCENT MATERIAL, THE JUNCTION BETWEEN SAID SINGLE CRYSTAL LAYER AND SAID SINGLE CRYSTAL SUBSTRATE BEING A HETEROJUNCTION, A LAYER OF N-TYPE SEMICONDUCTOR MATERIAL ON WHICH SAID P-TYPE SEMICONDUCTOR MATERIAL SUBSTRATE IS LOCATED, AND A SUBSTANTIALLY OPTICALLY TRANSPARENT LAYER OF METAL DEPOSITED ON THE FREE FACE OF SAID LAYER OF ELECTROLUMINESCENT MATERIAL.
Claim 2
Dependent Claim
81 words
AN ELECTROLUMINESCENT DEVICE COMPRISING A SINGLE CRYSTAL LAYER OF AN ELECTROLUMINESCENT MATERIAL ON A SINGLE CRYSTAL SUBSTRATE OF A P-TYPE SEMICONDUCTOR MATERIAL HAVING SUBSTANTIALLY THE SAME CRYSTAL STRUCTURE AS SAID ELECTROLUMINESCENT MATERIAL, THE JUNCTION BETWEEN SAID SINGLE CRYSTAL LAYER AND SAID SINGLE CRYSTAL SUBSTRATE BEING A HETEROJUNCTION, A LAYER OF N-TYPE SEMICONDUCTOR MATERIAL ON WHICH SAID P-TYPE SEMICONDUCTOR MATERIAL SUBSTRATE IS LOCATED, AND A SUBSTANTIALLY OPTICALLY TRANSPARENT LAYER OF METAL DEPOSITED ON THE FREE FACE OF SAID LAYER OF ELECTROLUMINESCENT MATERIAL.
References Cited (Backward Citations)
US2735049A
Cited
US2683794A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-09-20 | 1969-03-22 | 1969-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-20 | 1973-03-22 | 1973-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-20 | 1977-03-22 | 1977-09-21 | $7700.00 | Window Closed / Lapsed |