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US 4,614,891 AGranted
Photoconductive target of image pickup tube
AssigneeKabushiki Kaisha Toshiba
InventorsTakao Kuwahata, Sohei Manabe, Katsuhiro Gonpei, Masatoki Nakabayashi
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Abstract
A photoconductive target of an image pickup tube consists of a transparent substrate, a transparent conductor formed thereon, a photoconductive layer, containing Cd, Te and Se and formed on the conductive layer, and a high resistance layer formed on the photoconductive layer. The Molar ratios of Cd, Te and Se contained in the photoconductive layer satisfy a general formula CdTe.sub.1-x Se.sub.x where x falls within the range between 0.3 and 0.5.
Claims4
A photoconductive target of an image pickup tube, comprising:
- a transparent substrate,
- a transparent electro-conductive layer formed on said transparent substrate,
- a photoconductive layer which contains cadmium, tellurium and selenium as major components and is formed on said transparent electro-conductive layer said photoconductive layer being formed of a single phase of a continuous multilayer in which cadmium telluride and cadmium selenide are alternately deposited without defined boundaries existing between these materials, and
- a high resistance layer formed on said photoconductive layer,
- molar ratios of cadmium, tellurium and selenium contained in said photoconductive layer satisfy a general formula CdTe.sub.1-x Se.sub.x where x falls within a range between 0.3 and 0.5 thereby producing a photoconductive target with high sensitivity in the infra-red band.
2 more elements
Dependencies are inferred from the claim text.