Browse Prior Art Database

Original Publication Date: 1977-Jun-30
Included in the Prior Art Database: 2004-Mar-29

Publishing Venue

Xerox Disclosure Journal


Photodimerization of anthracene containing polymers causes a change in the photoconductivity of these materials. This property can be exploited to provide an imaging system or an information storage system. In operation a film of an anthra-cene containing polymer is deposited on a layer of a charge carrier generating material such as, for example, selenium and exposed to activating radiation, In the light-struck areas the anthracene groups are dimerized while in the dark areas they remain the same. Hence, the anthracene-group containing polymer in the dark areas retains its photoconductivity where-as the anthracene groups in the irradiated areas are converted to nonconductive dimers, The film is then corona charged and exposed uniformly to weak diffused light. In those areas which still include anthracene groups the charge carriers are transported through the film while in the areas where dimeri-zation took place, the charge stays on the surface. The electrostatic latent image is then developed with toner and transferred to a receiver member. Alternatively, the film on the charge carrier generating material can be imagewise exposed after being corona charged such that two visible images are obtained,