US3819974A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gallium nitride metal-semiconductor junction light emitting diode
Assignee: Individual
•
Filing: 1973-03-12
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Granted: 1974-06-25
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Expires: 1993-03-12
Abstract
Abstract A light emitting diode comprising a first layer of gallium nitride, a second, substantially intrinsic layer of magnesium doped gallium nitride forming a junction therewith, a metallic rectifying contact to the second layer, an ohmic contact to the first layer, and means for applying a voltage across said contacts and said junctions whereby to bias the device and generate light.
Inventors
- 👤 D Stevenson
- 👤 W Rhines
- 👤 H Maruska
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:44
CPC Classifications
H; H10; H10H; H10H20/00; H10H20/80; H10H20/81; H10H20/822; H10H20/824; H10H20/825; Y; Y10; Y10S; Y10S148/00; Y10S148/113; Y10S148/15
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
24 words
A light emitting diode as in claim 1 wherein said magnesium has a concentration in the range of 5 X 1019 to 1021 atoms/cm3.
Claim 2
Dependent Claim
23 words
A light emitting diode as in claim 2 wherein said second layer has a thickness in the range of 5 to 20 microns.
Claim 3
Independent Claim
56 words
The method of generating violet light which comprises the steps of trapping electrons in magnesium acceptors in an intrinsic gallium nitride layer, causing removal of said electrons from said acceptors by applying an electric field of sufficient magnitude to remove the electrons, and causing electrons to recombine with said magnesium acceptors whereby to generate violet light.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-06-24 | 1977-12-24 | 1978-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-24 | 1981-12-24 | 1982-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-24 | 1985-12-24 | 1986-06-25 | $7700.00 | Window Closed / Lapsed |