Photosensitive body for electrophotography with protective and i

Details Photosensitive body for electrophotography with protective and i Photosensitive body for electrophotography with protective and i

1988-11-14

1989-11-14

Welsh, J. David

Radiation imagery chemistry: process, composition, or product th

Electric or magnetic imagery, e.g., xerography,...

Radiation-sensitive composition or product

430 66, 430 67, 430 85, G03G 514

Patent

active

048807176

ABSTRACT:
The present invention provides a photosensitive body of Se-based function separation type to be used in electrophotographic equipment which employs long wavelength light for writing. Such a body exhibits outstanding abrasion resistance and heat resistance without sacrificing good electrical properties. This is accomplished by interposing an intermediate layer of As-Se alloy between the surface protective layer and the chargeable layer. The intermediate layer contains As in an increasing concentration gradient across the section of the layer from the chargeable layer to the surface protective layer. This graded As concentration causes the coefficient of thermal expansion to gradually decrease across the intermediate layer section in the direction from the chargeable layer to the surface protective layer. Thus the intermediate layer prevents the surface protective layer from thermal stress and cracking by acting as a transition buffer between the differing properties of the protective layer and chargeable layer.

REFERENCES:
patent: 4710442 (1987-12-01), Koelling et al.

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