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US 4,382,917 AGranted
Process for preparing cadmium sulfide for electrophotography and product thereof
AssigneeCanon Kabushiki Kaisha
InventorsKiyoshi Suzuki, Hirokuni Kawashima
Life of this patent
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Abstract
Cadmium sulfide particles are heated in a solution of a compound capable of generating sulfur when heated. The cadmium sulfide thus treated is suitable for a photoconductive material for electrophotography.
Claims3
A process for preparing cadmium sulfide adapted for use in an electrophotographic photosensitive member which comprises:
- (a) preparing a cadmium sulfide feed by firing precipitated cadmium sulfide containing doping impurities to enhance photoconductivity thereof,
- (b) heating said feed in a solution of a compound capable of generating sulfur when heated under conditions sufficient to generate said sulfur, and
- (c) recovering a cadmium sulfide having a photoconductivity greater than that of said cadmium sulfide feed, which exhibits rapid photodecay and uniform image quality after prolonged inactivity.
Dependencies are inferred from the claim text.