Printing drum for an electrostatic imaging process with a doped amorphous silicon layer

摘要

A printing drum is disclosed for electrostatic copying. The drum has a photo-electric-sensitive layer consisting of amorphous silicon advantageously containing hydrogen. The layer is designed to have a PN transition. A method is also disclosed for producing the layer by means of decomposition of a conveyed silicon-containing gas to which, if necessary, a gaseous doping material is added during a glow discharge in a heated printing drum.