US3721938A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cadmium telluride devices with non-diffusing contacts
Assignee: Tyco International Ltd
•
Filing: 1971-12-23
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Granted: 1973-03-20
•
Expires: 1991-12-23
Abstract
Abstract A method of providing non-diffusing contacts for cadmium telluride semiconductor devices, notably photodetectors. The contacts consist of iridium applied by sputtering and are low resistance, but also photosensitive at 400*C.
Inventors
- 👤 G Entine
- 👤 F Cocks
- 👤 C Mitchell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 20:12
CPC Classifications
H; H10; H10F; H10F77/00; H10F77/20; H10F77/206; H10D; H10D64/00; H10D64/01; H10D64/011
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
23 words
A device according to claim 1 wherein said contact comprises a film having a thickness in the order of 2,000 Angstroms or more.
Claim 2
Dependent Claim
12 words
A semiconductor device according to claim 1 where said contact is photosensitive.
Claim 3
Dependent Claim
23 words
A semiconductor device according to claim 1 wherein said crystal has two contacts made of iridium located at spaced portions of said crystal.
Claim 4
Dependent Claim
13 words
A semiconductor device according to claim 4 wherein said device is a photodetector.
Claim 5
Independent Claim
18 words
A method of providing an electrical contact for a cadmium telluride crystal comprising attaching iridium onto said crystal.
References Cited (Backward Citations)
US2866878A
Cited
US2965867A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-03-19 | 1976-09-18 | 1977-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-19 | 1980-09-18 | 1981-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-19 | 1984-09-18 | 1985-03-20 | $7700.00 | Window Closed / Lapsed |