IMPROVED CONDUCTION LAYER FOR AN ORGANIC PHOTORECEPTOR SUBSTRATE
Original Publication Date: 1982-Oct-31
Included in the Prior Art Database: 2004-Apr-04
Xerox Disclosure Journal
Flexible photoreceptors comprising a substrate, conductive layer, and one or more photoconductive layers, the conductive layer having closely spaced microholes drilled therein with a laser. This concept reduces buildup of residual voltage after extensive copy cycles and permits the use of more durable, thicker conductive layers. The thicker conductive layers are more abrasion-resistant and yet may be light transmissive because of the microholes formed. The laser drilling may be effected with Nd-YAG lasers to form hole diameters of about 25 micrometers or smaller. Reproducible and exact hole patterns can be rapidly and economically produced with a numerically controlled x-y handling table positioned under the laser beam to optimize internal lighting in xerographic designs. Power require-ments for lighting may be minimized by increasing the hole area whereby more than 20 percent light transmission is achieved. The use of a suitably short-wavelength laser beam, e.g., 1.06 micrometers, and transparent substrates also avoids ablation of the substrate.