US4005327A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low beam velocity retina for Schottky infrared vidicons
Assignee: United States Department of the Air Force
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Filing: 1975-10-28
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Granted: 1977-01-25
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Expires: 1995-10-28
Abstract
Abstract A solid state sensing retina for infrared vidicon television camera tubes using a low voltage electron beam, consisting of a monolithic silicon wafer having an n-type substrate and two dimensional array of p-type islands, each island has a Schottky electrode photoemitter and substrate contact buss, an ohmic contact pad allows charging of the p-type region beneath the Schottky electrode.
Inventors
- 👤 Sven A. Roosild
- 👤 Freeman D. Shepherd, Jr.
- 👤 Andrew C. Yang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:23
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/02; H01J29/10; H01J29/36; H01J29/39; H01J29/45; H01J29/451; H01J29/453; H01J29/455
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
159 words
A solid state retina sensing layer for infrared vidicon tubes comprising a base having one conductivity type; a plurality of cells of a second conductivity type, arranged in a two dimensional array and forming junctions with said base, a contact formed near the surface of said cell; infrared photo-emitter means affixed to at least one surface of each cell; a plurality of contact means in said base located between said cells; buss means for connecting the photoemitter means with the base contact means; a dielectric coating covering the surface of the base receiving the electron beam, a metal electrode for each cell positioned on the surface of said dielectric coating and extending through the coating to the contact of said cell whereby electrons reaching the electrode will place a charge on the cell, and a resistance means connecting the base to ground potential where the amount of charge lost by the cell due to infrared radiation may be measured.
Claim 2
Dependent Claim
159 words
A solid state retina sensing layer for infrared vidicon tubes comprising a base having one conductivity type; a plurality of cells of a second conductivity type, arranged in a two dimensional array and forming junctions with said base, a contact formed near the surface of said cell; infrared photo-emitter means affixed to at least one surface of each cell; a plurality of contact means in said base located between said cells; buss means for connecting the photoemitter means with the base contact means; a dielectric coating covering the surface of the base receiving the electron beam, a metal electrode for each cell positioned on the surface of said dielectric coating and extending through the coating to the contact of said cell whereby electrons reaching the electrode will place a charge on the cell, and a resistance means connecting the base to ground potential where the amount of charge lost by the cell due to infrared radiation may be measured.
Claim 3
Dependent Claim
22 words
A solid state retina sensing layer for infrared vidicon tubes according to claim 1 wherein said base comprises a monolithic silicon wafer.
Claim 4
Dependent Claim
24 words
A solid state retina sensing layer for infrared vidicon tubes according to claim 2 wherein said monolithic silicon wafer base includes an n-type substrate.
Claim 5
Dependent Claim
28 words
A solid state retina sensing layer for infrared vidicon tubes according to claim 1 wherein each of said cells comprising a p-type silicon island formed in the base.
Claim 6
Dependent Claim
22 words
A solid state retina sensing layer for infrared vidicon tubes according to claim 1 wherein said infrared photoemitter is a Schottky electrode.
Claim 7
Dependent Claim
21 words
A solid state retina sensing layer for infrared vidicon tubes according to claim 1 wherein said dielectric coating is silicon dioxide.
References Cited (Backward Citations)
US3676715A
Cited
US3703669A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-01-25 | 1980-07-26 | 1981-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-01-25 | 1984-07-26 | 1985-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-01-25 | 1988-07-26 | 1989-01-25 | $7700.00 | Window Closed / Lapsed |