Rca Inc.

Robert Milton Moore

Charles John Busanovich

John A Van Raalte

John T Fischer

A low dark current vidicon is disclosed having a target comprising a thallium doped layer of hexagonal, or trigonal, polycrystalline selenium. A mechanically stable blocking contact for holes is also provided by a transparent tin oxide electrode in intimate proximity to the layer along a major surface of a faceplate in contact with the target.

Polycrystalline selenium imaging devices

A cadmium selenide base layer is vapor deposited on a substrate and thermally treated to achieve a desired photosensitivity, crystallographic structure, and granularity.

Method of forming and treating cadmium selenide photoconductive bodies

A photoconductive target for a vidicon-type camera tube, which includes a layer of polycrystalline selenium, is exposed to a diffusion cycle wherein the temperature is gradually increased from an initial baking temperature of about 50.degree. C. to a final baking temperature of about 150.degree. C. at a rate of about 5.degree. C. per minute. Thereafter the target is baked at a temperature of about 100.degree. C. for about 16 hours in oxygen to substantially reduce the dark current of the target.

Method of fabricating polycrystalline selenium imaging devices

A rectifying junction suitable for use in photosensitive devices is fabricated between a polycrystalline selenium layer and an electrode of n-type or low work function metal material.

Selenium rectifier having hexagonal polycrystalline selenium layer

A low dark current photoconductive body includes an aluminum oxide overlayer on a cadmium selenide base layer. A transition region is provided at the interface region between the base layer and the overlayer and consists of a graded transition of cadmium and selenium with increasing amounts of aluminum and oxygen. An alternative body is disclosed omitting the overlayer. A blocking contact is provided within a portion of the body including the overlayer and/or the transition region.

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Carmel, IN, United States of America

Robert Milton Moore