Patent ID: 7938990
Filing Date: 2011-05-10
Classification: B82Y,G11B,H01J,Y10S

Abstract:
1. A pattern drawing method comprising: rotating a substrate having a resin layer formed on a surface thereof, for having a concave/convex pattern formed on the resin layer for producing information recording media, by a rotating mechanism; moving the rotating mechanism along a plane on which the substrate is rotated; and emitting a drawing beam toward the resin layer while controlling timing of both emission of the drawing beam and stoppage of the emission of the drawing beam, so as to draw an exposure pattern for forming the concave/convex pattern on the resin layer, wherein a circle drawing process that performs a partial drawing process a plurality of times per circle of the substrate according to the number of patterns, and a drawing position-changing process are alternately performed a plurality of times, the partial drawing processes being performed after a predetermined standby time period in response to output of a reference signal that is synchronous with rotation of the substrate and generated with reference to either an internal signal generated within the rotating mechanism or a rotation drive signal supplied to the rotating mechanism, by emitting the drawing beam that has an effective drawing width narrower than a width and a length of each of patterns forming the exposure pattern so as to draw a part of each of the patterns which is partial in a direction of the width of each of the patterns, the drawing position-changing process changing a position on the resin layer where the part is to be drawn by each of the partial drawing processes, in a predetermined one of a direction toward a center of rotation of the substrate by the rotating mechanism and a direction away from the center of rotation, within a range of the effective drawing width, so as to draw the exposure pattern on the resin layer, the standby time period being changed prior to a start of the partial drawing processes of a said circle drawing process performed after completion of the prior said circle drawing process.