US3757123A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Schottky barrier infrared detector having ultrathin metal layer
Assignee: HP Inc
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Filing: 1972-07-19
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Granted: 1973-09-04
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Expires: 1992-07-19
Abstract
Abstract A metal film less than 100 Angstroms thick is deposited on one face of a semiconductor substrate to form a Schottky-barrier diode. Photons absorbed in the metal form electron-hole pairs; and those carriers with sufficient energy, in the right direction to cross the Schottky barrier, cause a current which is proportional to the incident radiant flux.
Inventors
- 👤 R Archer
- 👤 J Cohen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:13
CPC Classifications
H; H10; H10F; H10F39/00; H10F39/10; H10F39/12; H10F39/18; H10F39/184; H10F99/00; Y; Y10; Y10S; Y10S148/00; Y10S148/139
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
17 words
A detector as in claim 1 wherein the metal film is approximately 40 to 75 Angstroms thick.
Claim 2
Dependent Claim
16 words
A detector as in claim 1 wherein the metal film is less than 75 Angstroms thick.
Claim 3
Dependent Claim
16 words
A detector as in claim 2 wherein the semiconductor is silicon and the metal is gold.
Claim 4
Dependent Claim
17 words
A detector as in claim 2 wherein the semiconductor is p-type germanium and the metal is gold.
Claim 5
Dependent Claim
17 words
A detector as in claim 1 wherein the detector is maintained at a temperature below 77* K.
Claim 6
Dependent Claim
15 words
A detector as in claim 1 wherein the radiation detected is incident upon the semiconductor.
Claim 7
Dependent Claim
40 words
A detector as in claim 1 wherein there is a plurality of distinct and separate metal films deposited on the semiconductor, with circuit means connected to the plurality of metal films and the non-rectifying contact for responding to signals thereon.
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) | 1976-09-03 | 1977-03-05 | 1977-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-03 | 1981-03-05 | 1981-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-03 | 1985-03-05 | 1985-09-04 | $7700.00 | Window Closed / Lapsed |