Printing member for electrostatic printing having a high crystal

Details Printing member for electrostatic printing having a high crystal Printing member for electrostatic printing having a high crystal

1986-05-07

1988-03-15

Goodrow, John L.

Radiation imagery chemistry: process, composition, or product th

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

To produce printing surface

430 57, 430 84, G03G 1326

Patent

active

047313145

ABSTRACT:
A printing member for electrostatic photocopying including a substrate having a conductive surface; and a photoelectrically-sensitive, electrically chargeable layer on the conductive surface of the substrate; wherein the photo-electrically-sensitive, electrically chargeable layer has (a) a first layer member formed on the conductive surface of the substrate, the first layer member having a P or N or I type first non-single-crystal semiconductor layer or a first semi-insulating or insulating layer, (b) a second layer member formed on the first layer member, the second layer member being a first laminate member having an I type second non-single-crystal semiconductor layer and an I type third non-single-crystal semiconductor layer having a small energy band gap than that of the second non-single-crystal semiconductor layer, and (c) a third layer member formed on the second non-single-crystal semiconductor layer, the third layer member having an I type fourth non-single-crystal semiconductor layer having an equal to or larger energy band gap than that of the second non-single-crystal semiconductor layer, or a second semi-insulating or insulating layer, or a second laminate member having the fourth non-single-crystal semiconductor layer or second semi-insulating layer and the insulating layer; and wherein the third non-single-crystal semiconductor layer has a higher degree of crystallization than the second non-single-crystal semiconductor layer.

REFERENCES:
patent: 4526849 (1985-07-01), van der Voort et al.
patent: 4572881 (1986-02-01), Yamazaki
patent: 4632894 (1986-12-01), Ohashi et al.

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