Patent US4248675A successfully refreshed from Google Patents.
US4248675A
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Method of forming electrical contact and antireflection layer on solar cells
Assignee: Massachusetts Institute of Technology
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Filing: 1980-02-25
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Granted: 1981-02-03
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Expires: 2000-02-25
Abstract
Abstract A method of applying an electrical contact and an anodic reflection coating to an n+ layer of a direct gap semiconductor device, comprising applying an anodizable metal contact to the n+ layer and thereafter anodizing the n+ layer whereby its thickness is reduced and an antireflection layer is formed thereover.
Inventors
- 👤 Carl O. Bozler
- 👤 Ralph L. Chapman
- 👤 John C. C. Fan
- 👤 Robert W. McClelland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:38
CPC Classifications
H; H10; H10F; H10F77/00; H10F77/20; H10F77/206; H10F77/211; H10F77/30; H10F77/306; H10F77/311; H10F77/315; Y; Y02; Y02E; Y02E10/00; Y02E10/50
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
58 words
A method of applying an electrical contact and an anodic antireflection coating to an n + layer of a direct gap semiconductor device, comprising: a. applying a metal contact to said n + layer, said metal being anodizable; and, thereafter b. anodizing said n + layer whereby its thickness is reduced and an antireflection layer is formed thereover.
Claim 2
Independent Claim
58 words
A method of applying an electrical contact and an anodic antireflection coating to an n + layer of a direct gap semiconductor device, comprising: a. applying a metal contact to said n + layer, said metal being anodizable; and, thereafter b. anodizing said n + layer whereby its thickness is reduced and an antireflection layer is formed thereover.
Claim 3
Dependent Claim
11 words
A method of claim 1 wherein said anodizable metal comprises tin.
References Cited (Backward Citations)
US3982265A
Cited
US4133724A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-02-03 | 1984-08-04 | 1985-02-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-02-03 | 1988-08-04 | 1989-02-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-02-03 | 1992-08-04 | 1993-02-03 | $7700.00 | Window Closed / Lapsed |