US4446365A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrostatic imaging method
Assignee: Quantum Imaging Corp
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Filing: 1981-07-06
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Granted: 1984-05-01
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Expires: 2001-07-06
Abstract
Abstract A method of operating a photodetector system. The method impresses a surface charge on a photon detector by establishing an electric potential across the detector, storing the detector in the dark, disconnecting the source of electric potential, and electrically connecting layers in the detector.
Inventors
- 👤 Poen S. Ong
- 👤 Alfonso Zermeno
- 👤 Lee M. Marsh, Jr.
- 👤 James M. Hevezi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 01:02
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; H; H10; H10F; H10F99/00; G01; G01T; G01T1/00; G01T1/16; G01T1/26; G03G15/00; G03G15/22; G03G15/221; G03G15/222; G21; G21K; G21K4/00; H05; H05G; H05G1/00; H05G1/08; H05G1/26; H05G1/30; H05G1/38; H05G1/42
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
115 words
A method of impressing a uniform surface charge on a multilayered photon detector having sequentially stacked in plane parallel a first conducting layer, a junction layer, a photoconductive layer, an insulating layer, and a transparent conductive layer comprising: connecting a high electric potential across the first conducting layer and the transparent conductive layer; storing the detector in the dark; disconnecting the source of external electric potential while said detector is in the dark; electrically connecting said first conducting layer to said transparent conducting layer while said detector is in the dark; and reapplying the potential with reversed polarity between said first conducting layer and said transparent conducting layer while said detector is in the dark.
Claim 2
Independent Claim
115 words
A method of impressing a uniform surface charge on a multilayered photon detector having sequentially stacked in plane parallel a first conducting layer, a junction layer, a photoconductive layer, an insulating layer, and a transparent conductive layer comprising: connecting a high electric potential across the first conducting layer and the transparent conductive layer; storing the detector in the dark; disconnecting the source of external electric potential while said detector is in the dark; electrically connecting said first conducting layer to said transparent conducting layer while said detector is in the dark; and reapplying the potential with reversed polarity between said first conducting layer and said transparent conducting layer while said detector is in the dark.
Claim 3
Dependent Claim
28 words
A method as in claim 1 including flooding the transparent conductive layer side of the multilayered detector with light while the high potential is connected across the detector.
Claim 4
Dependent Claim
15 words
A method as in claim 1 wherein said electric potential is at least 2000 volts.
References Cited (Backward Citations)
US2833930A
Cited
US3000735A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-05-01 | 1987-10-31 | 1988-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-05-01 | 1991-10-31 | 1992-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-05-01 | 1995-10-31 | 1996-05-01 | $7700.00 | Window Closed / Lapsed |