US3669767A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Doping profile for gap diodes improved electroluminescent efficiency
Assignee: AT&T Inc
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Filing: 1969-08-21
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Granted: 1972-06-13
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Expires: 1989-08-21
Abstract
Abstract THE DIFFUSION OF RELATIVELY MOBILE ACCEPTOR DOPANT ATOMS AWAY FROM THE EPITAXIALLYL-GROWN P-N JUNCTION OF A GALLIUM PHOSPHIDE ELETROLUMINESCENT DEVICE DURING THE EPTIAXIAL GROWTH PROCESS CAUSES THE DEGRADATION OF ELECTROLUMINESCENT EFFICIENCY. THIS DIFFUSION CAN BE PREVENTED BY THE INCLUSION OF THE MOBILE ACCEPTOR DOPANT AS A MINOR DOPANT IN THE N-REGION IN ESSENTIALLY THE SAME CONCENTRATION AS IS PRESENT AS THE MAJOR DOPANT IN THE P-REGION.
Inventors
- 👤 William H Hackett Jr
- 👤 Donald L Scharfetter
- 👤 Lawrence J Varnerin Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 07:06
CPC Classifications
H; H10; H10P; H10P14/00; H10P14/20; H10P14/29; H10P14/2901; H10P14/2907; H10P14/2909; H10H; H10H20/00; H10H20/80; H10P14/26; H10P14/263; H10P14/265; H10P14/32; H10P14/3202; H10P14/3214; H10P14/3218; H10P14/34; H10P14/3402; H10P14/3414; H10P14/3418; H10P14/3438; H10P14/3441; H10P14/3442; H10P14/3444; Y; Y10; Y10S; Y10S148/00; Y10S148/049; Y10S148/119; Y10S438/00; Y10S438/914; Y10S438/919; Y10S438/925
Claims Analysis
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-06-13 | 1975-12-13 | 1976-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-13 | 1979-12-13 | 1980-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-13 | 1983-12-13 | 1984-06-13 | $7700.00 | Window Closed / Lapsed |