Electrophotographic photosensitive plate

Details Electrophotographic photosensitive plate Electrophotographic photosensitive plate

G - Physics

03

G

96/192

G03G 5/02 (2006.01) G03G 5/043 (2006.01)

Patent

CA 1036860

ELECTROPHOTOGRAPHIC PHOTOSENSITIVE PLATE ABSTRACT OF THE DISCLOSURE An electrophotographic photosensitive plate having, in order from the bottom up, an electrically conductive substrate, a photosensitizing layer composed of vitreous selenium and tellurium having a thickness of 0.1 to 3 microns, and a top organic layer including polyvinyl carbazole or a derivative thereof, the photosensitizing layer being composed of a first layer of 0.05 to 2 microns in thickness having 60 to 90 weight % of selenium and 40 to 10 weight % of tellurium and a second layer of 0.05 to 1 microns in thickness having a higher concentration of selenium than that of the first layer, and the second layer being positioned between the first layer and the top organic layer. This invention also provides a process of producing a latent electrostatic image on the plate by providing a negative electrostatic charge thereon and exposing the plate to a light image of visible light having a wavelength in the range of 4000 to 8000 .ANG.. Advantages of this electro- photographic plate are that it has high sensitivity to the visible light along with low residual potential.

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