US3743847A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Amorphous silicon film as a uv filter
Assignee: Motorola Solutions Inc
•
Filing: 1971-06-01
•
Granted: 1973-07-03
•
Expires: 1991-06-01
Abstract
Abstract There is disclosed the use of a thin amorphous silicon film as a narrow-band rejection filter which is used either as a mask to UV light in semiconductor device processing or is used as a protective shield for solar cells which overheat in the presence of ultraviolet light.
Inventors
- 👤 B Boland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 00:51
CPC Classifications
G; G02; G02B; G02B5/00; G02B5/20; G02B5/208; H; H10; H10F; H10F71/00; H10F71/10; H10F71/103; H10F77/00; H10F77/30; H10F77/306; H10F77/311; H10F77/315; Y; Y02; Y02E; Y02E10/00; Y02E10/50; Y10; Y10S; Y10S148/00; Y10S148/12; Y10S148/122
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
39 words
The filter as recited in claim 1 wherein said substrate is a solar cell having its active surface adjacent said silicon layer whereby infrared radiation passes through the filter to power the cell while degrading ultraviolet radiation is blocked.
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) | 1976-07-02 | 1977-01-01 | 1977-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-02 | 1981-01-01 | 1981-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-02 | 1985-01-01 | 1985-07-03 | $7700.00 | Window Closed / Lapsed |