US3984261A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ohmic contact
Assignee: RCA Corp
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Filing: 1975-12-15
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Granted: 1976-10-05
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Expires: 1995-12-15
Abstract
Abstract A contact of an indium gallium arsenide alloy forms an ohmic contact with a body of n-type or p-type single crystal gallium arsenide of a resistivity of 1 ohm-cm or greater. The method for forming the contact utilizes a low temperature range. This low temperature range lessens the amount of surface disassociation and aids in the prevention of contamination of the body of gallium arsenide.
Inventors
- 👤 Frank Zygmunt Hawrylo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 05:26
CPC Classifications
H; H10; H10W; H10W99/00; C; C30; C30B; C30B19/00; C30B19/06; C30B19/061; H10D; H10D64/00; H10D64/60; H10D64/62; H10P; H10P95/00; H10P95/50; H10W20/00; H10W20/40; H10D62/00; H10D62/80; H10D62/85
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
28 words
An ohmic contact comprising: a body of single crystal, high resistivity gallium arsenide, and a layer of an indium gallium arsenide alloy on a surface of said body.
Claim 2
Dependent Claim
28 words
An ohmic contact comprising: a body of single crystal, high resistivity gallium arsenide, and a layer of an indium gallium arsenide alloy on a surface of said body.
Claim 3
Dependent Claim
25 words
An ohmic contact in accordance with claim 1 in which said body of single crystal gallium arsenide has a resistivity of 1 ohm-centimeter or greater.
Claim 4
Dependent Claim
33 words
An ohmic contact in accordance with claim 2 in which a first metallic layer is on said indium gallium arsenide alloy layer and a second metallic layer is on said first metallic layer.
Claim 5
Dependent Claim
24 words
An ohmic contact in accordance with claim 3 in which said first metallic layer is of nickel and said second metallic layer is gold.
References Cited (Backward Citations)
US3632431A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-10-05 | 1980-04-05 | 1980-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-10-05 | 1984-04-05 | 1984-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-10-05 | 1988-04-05 | 1988-10-05 | $7700.00 | Window Closed / Lapsed |