DOT-TRAP PHOTORECEPTOR FOR DIPOLE XEROGRAPHY
Original Publication Date: 1980-Oct-31
Included in the Prior Art Database: 2004-Apr-02
Xerox Disclosure Journal
An improved photoreceptor structure suitable for dipole xerography is shown in the figure wherein 11 is a leaky or dielectric overcoating depending on the method of charging, 13 is a dot pattern of hole trapping material, 15 is a photogenerator layer such as phthalocyanine or selenium, 17 is a hole transport layer such as polyvinylcarbazole, 19 is an optional layer depending upon the character of layer 11 and the type of charging employed, and 21 is a base electrode. When overcoating 11 is a leaky polymer such as Tedlar (a trademark of E. I. du Pont de Nemours & Co.), the photoreceptor may be contact charged and layer 19 is eliminated. When layer 11 is a dielectric such as polyurethane, a dark injection electrode layer 19 for holes is required for dual charging.