US3437527A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for producing a solar cell having an integral protective covering
Assignee: National Aeronautics and Space Administration
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Filing: 1966-10-26
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Granted: 1969-04-08
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Expires: 1986-10-26
Abstract
No abstract record available.
Inventors
- 👤 Peter A Iles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:30
CPC Classifications
H; H10; H10F; H10F77/00; H10F77/30; H10F77/306; H10F77/311; H10P; H10P14/00; H10P14/60; H10P95/00; Y; Y02; Y02E; Y02E10/00; Y02E10/50
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
136 words
A METHOD FOR PRODUCING A SOLAR CELL HAVING AN INTEGRAL PROTECTIVE COVERING COMPRISING THE STEPS OF: DOPING THE SURFACE OF A SEMICONDUCTOR SLICE OF ONE OF THE CONDUCTIVITY TYPES IN AN OXIDIZING ATMOSPHERE TO CREATE A DIFFUSED SURFACE LAYER OF THE OPPOSITE CONDUCTIVITY TYPE COVERED BY A THIN DIELECTRIC LAYER, REMOVING THE OPPOSITE CONDUCTIVITY TYPE LAYER AND DIELECTRIC LAYER FROM ALL BUT THE TOP SURFACE OF THE SEMICONDUCTOR SLICE, APPLYING A METAL CONTACT TO THE TOP SURFACE OF THE SLICE, DEPOSITING GLASS POWDER ONTO THE TOP SURFACE OF THE SLICE AND OVER THE METAL CONTACT, HEATING THE SLICE TO FUSE THE GLASS POWDER THERETO AND SIMULTANEOUSLY DIFFUSING THE METAL CONTACT THROUGH THE DIELECTRIC LAYER TO ESTABLISH OHMIC CONTACT WITH THE DIFFUSED SURFACE LAYER, AND APPLYING A SECOND METAL CONTACT TO THE BOTTOM SURFACE OF THE SLICE.
Claim 2
Independent Claim
136 words
A METHOD FOR PRODUCING A SOLAR CELL HAVING AN INTEGRAL PROTECTIVE COVERING COMPRISING THE STEPS OF: DOPING THE SURFACE OF A SEMICONDUCTOR SLICE OF ONE OF THE CONDUCTIVITY TYPES IN AN OXIDIZING ATMOSPHERE TO CREATE A DIFFUSED SURFACE LAYER OF THE OPPOSITE CONDUCTIVITY TYPE COVERED BY A THIN DIELECTRIC LAYER, REMOVING THE OPPOSITE CONDUCTIVITY TYPE LAYER AND DIELECTRIC LAYER FROM ALL BUT THE TOP SURFACE OF THE SEMICONDUCTOR SLICE, APPLYING A METAL CONTACT TO THE TOP SURFACE OF THE SLICE, DEPOSITING GLASS POWDER ONTO THE TOP SURFACE OF THE SLICE AND OVER THE METAL CONTACT, HEATING THE SLICE TO FUSE THE GLASS POWDER THERETO AND SIMULTANEOUSLY DIFFUSING THE METAL CONTACT THROUGH THE DIELECTRIC LAYER TO ESTABLISH OHMIC CONTACT WITH THE DIFFUSED SURFACE LAYER, AND APPLYING A SECOND METAL CONTACT TO THE BOTTOM SURFACE OF THE SLICE.
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) | 1972-04-07 | 1972-10-07 | 1973-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-07 | 1976-10-07 | 1977-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-07 | 1980-10-07 | 1981-04-08 | $7700.00 | Window Closed / Lapsed |