A printing member for electrostatic photocopying, comprises a substrate having a conductive surface and a photoelectric-sensitive, electrically chargeable layer deposited on the conductive surface of the substrate. The electrically chargeable layer has a non-single crystal semiconductor layer having...http://www.google.de/patents/US4971872?utm_source=gb-gplus-sharePatent US4971872 - Electrostatic photocopying machine
