Patent US3170067A successfully refreshed from Google Patents.
US3170067A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Semiconductor wafer having photosensitive junction
Assignee: AT&T Inc
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Filing: 1962-06-11
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Granted: 1965-02-16
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Expires: 1982-06-11
Abstract
No abstract record available.
Inventors
- 👤 Lynden U Kibler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:20
CPC Classifications
H; H04; H04B; H04B10/00; H04B10/60; H10; H10F; H10F99/00; H10P; H10P95/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
135 words
A SIGNAL TRANSLATING DEVICE RESPONSIVE TO SIGNALS IN THE OPTICAL RANGE COMPRISING A GERMANIUM SEMI-CONDUCTOR WATER SUBSTANTIALLY OF ONE CONDUCTIVITY TYPE HAVING A MESA PORTION ON ONE SURFACE THEREOF, SAID MESA PORTION COMPRISING A HIGH RESISTIVITY EPITAXIALLY-DEPOSITED GERMANIUM LAYER HAVING A THICKNESS OF BETWEEN 4 AND 10 MICRONS, SAID LAYER HAVING THEREIN A SMALL AREA PN JUNCTION LOCATED, APPROXIMATELY ONE-HALF WAY THROUGH THE THICKNESS OF SAID LAYER, THE OPPOSITE SURFACE OF SAID WAFER HAVING A CAVITY THEREFROM IN ALIGNMENT WITH SAID SMAL AREA PN JUNCTION, SAID CAVITY EXTENDING TO JUST SHORT OF THE BOUNDARY OF SAID HIGH RESISTIVITY LAYER, THEREBY DEFINING AN ACTIVE DETECTING REGION BETWEEN SAID JUNCTION AND THE OPPOSITE BOUNDARY OF SAID LAYER, THE MINORITY CARRIER LIFETIME, IN SAID MESA PORTION BEING RELATIVELY HIGH COMPARED WITH THAT OF THE REMAINDER OF SAID WAFER.
Claim 2
Dependent Claim
135 words
A SIGNAL TRANSLATING DEVICE RESPONSIVE TO SIGNALS IN THE OPTICAL RANGE COMPRISING A GERMANIUM SEMI-CONDUCTOR WATER SUBSTANTIALLY OF ONE CONDUCTIVITY TYPE HAVING A MESA PORTION ON ONE SURFACE THEREOF, SAID MESA PORTION COMPRISING A HIGH RESISTIVITY EPITAXIALLY-DEPOSITED GERMANIUM LAYER HAVING A THICKNESS OF BETWEEN 4 AND 10 MICRONS, SAID LAYER HAVING THEREIN A SMALL AREA PN JUNCTION LOCATED, APPROXIMATELY ONE-HALF WAY THROUGH THE THICKNESS OF SAID LAYER, THE OPPOSITE SURFACE OF SAID WAFER HAVING A CAVITY THEREFROM IN ALIGNMENT WITH SAID SMAL AREA PN JUNCTION, SAID CAVITY EXTENDING TO JUST SHORT OF THE BOUNDARY OF SAID HIGH RESISTIVITY LAYER, THEREBY DEFINING AN ACTIVE DETECTING REGION BETWEEN SAID JUNCTION AND THE OPPOSITE BOUNDARY OF SAID LAYER, THE MINORITY CARRIER LIFETIME, IN SAID MESA PORTION BEING RELATIVELY HIGH COMPARED WITH THAT OF THE REMAINDER OF SAID WAFER.
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) | 1968-02-16 | 1968-08-17 | 1969-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-02-16 | 1972-08-17 | 1973-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-02-16 | 1976-08-17 | 1977-02-16 | $7700.00 | Window Closed / Lapsed |