US2811682A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Silicon power rectifier
Assignee: AT&T Inc
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Filing: 1955-03-03
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Granted: 1957-10-29
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Expires: 1975-03-03
Abstract
No abstract record available.
Inventors
- 👤 Gerald L Pearson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 08:03
CPC Classifications
H; H10; H10D; H10D8/00; H10D8/50; H10D99/00; H10P; H10P32/00; H10P32/10; H10P32/12; H10P32/17; H10P32/171; H10P95/00; H10P95/50; H10W; H10W42/00; H10D62/00; H10D62/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
89 words
A RECTIFYING ELEMENT COMPRISING A SUBSTANTIALLY MONOCRYSTALLINE SILICON WAFER HAVING AN-INTERMEDIATE ZONE OF RELATIVELY HIGH SPECIFIC RESISTIVITY OF ONE CONDUCTIVITY TYPE, A FIRTS LOW SPECIFIC RESISTIVITY TERMINAL ZONE CONTIGUOUS WITH ONE SIDE OF THE INTERMEDIATE ZONE IN WHICH BORON IS THE PREDOMINANT SIGNIFICANT IMPURITY, AND A SECOND LOW SPECIFIC RESISTIVITY TERRMINAL ZONE CONTINGUOUS WITH THE OPPOSITE SIDE OF THE INTERMEDIATE ZONE IN WHICH PHOSPHORUS IS THE PREDOMINANT SIGNIFICANT IMPURITY, AND A PAIR OF ELECTRODES, EACH MAKING LOW OHMIC RESISTANCE CONNECTION TO A DIFFERENT ONE OF SAID TWO TERMINAL ZONES.
Claim 2
Dependent Claim
89 words
A RECTIFYING ELEMENT COMPRISING A SUBSTANTIALLY MONOCRYSTALLINE SILICON WAFER HAVING AN-INTERMEDIATE ZONE OF RELATIVELY HIGH SPECIFIC RESISTIVITY OF ONE CONDUCTIVITY TYPE, A FIRTS LOW SPECIFIC RESISTIVITY TERMINAL ZONE CONTIGUOUS WITH ONE SIDE OF THE INTERMEDIATE ZONE IN WHICH BORON IS THE PREDOMINANT SIGNIFICANT IMPURITY, AND A SECOND LOW SPECIFIC RESISTIVITY TERRMINAL ZONE CONTINGUOUS WITH THE OPPOSITE SIDE OF THE INTERMEDIATE ZONE IN WHICH PHOSPHORUS IS THE PREDOMINANT SIGNIFICANT IMPURITY, AND A PAIR OF ELECTRODES, EACH MAKING LOW OHMIC RESISTANCE CONNECTION TO A DIFFERENT ONE OF SAID TWO TERMINAL ZONES.
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) | 1960-10-28 | 1961-04-29 | 1961-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-10-28 | 1965-04-29 | 1965-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-10-28 | 1969-04-29 | 1969-10-29 | $7700.00 | Window Closed / Lapsed |