US4131904A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Degradation resistance of semiconductor electroluminescent devices
Assignee: RCA Corp
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Filing: 1977-06-29
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Granted: 1978-12-26
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Expires: 1997-06-29
Abstract
Abstract The P type conductivity layer or layers of an electroluminescent device includes zinc as the primary conductivity modifier, and germanium as the secondary conductivity modifier. The combination of zinc and germanium provide an electroluminescent device having improved reliability. In the method of fabricating the P type conductivity layer, the zinc and germanium are simultaneously introduced into the layer during deposition of the layer.
Inventors
- 👤 Ivan Ladany
- 👤 Henry Kressel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 02:42
CPC Classifications
H; H10; H10H; H10H20/00; H10H20/80; H10H20/81; H10H20/822; H10H20/824; H10H20/8242
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
110 words
An electroluminescent device having a body of semiconductor material of a group III-V compound or mixed group III-V compound comprising: a first layer of P type conductivity at one surface of said body, said layer having zinc as a primary conductivity modifier and germanium as a secondary conductivity modifier of a concentration smaller than the concentration of the zinc primary conductivity modifier; a second layer of N type conductivity at an opposite surface of said body; and a third layer between and contiguous to said first and second layers being of a material which forms hetero-junctions with said first and second layers, and being the recombination region of the device.
Claim 2
Dependent Claim
110 words
An electroluminescent device having a body of semiconductor material of a group III-V compound or mixed group III-V compound comprising: a first layer of P type conductivity at one surface of said body, said layer having zinc as a primary conductivity modifier and germanium as a secondary conductivity modifier of a concentration smaller than the concentration of the zinc primary conductivity modifier; a second layer of N type conductivity at an opposite surface of said body; and a third layer between and contiguous to said first and second layers being of a material which forms hetero-junctions with said first and second layers, and being the recombination region of the device.
Claim 3
Dependent Claim
16 words
An electroluminescent device in accordance with claim 1 wherein said body is of aluminum gallium arsenide.
Claim 4
Dependent Claim
15 words
An electroluminescent device in accordance with claim 1 wherein said body is of gallium arsenide.
Claim 5
Dependent Claim
47 words
An electroluminescent device in accordance with claim 1 wherein said zinc has a concentration of about 1 × 10 18 acceptor atoms/cm 3 and said germanium has a concentration in the range of about 5 × 10 16 to 1 × 10 17 acceptor atoms/cm 3 .
Claim 6
Dependent Claim
18 words
An electroluminescent device in accordance with claim 4 further comprising means for making electrical contact to said body.
Claim 7
Dependent Claim
33 words
An electroluminescent device in accordance with claim 5 wherein said electrical contacting means comprises a first electrode in contact with said first layer and a second electrode in contact with said second layer.
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) | 1981-12-25 | 1982-06-26 | 1982-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-12-25 | 1986-06-26 | 1986-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-12-25 | 1990-06-26 | 1990-12-26 | $7700.00 | Window Closed / Lapsed |