Patent ID: 7933186

Claim:
A method for manufacturing an optical disk master, the optical disk master comprising an optical disk master-forming substrate provided with an inorganic resist layer, the method comprising: applying a laser light to each of a plurality of radius positions in a region of the optical disk master-forming substrate provided with the inorganic resist layer, the laser light having a non-recording laser power smaller than a recording sensitivity of the inorganic resist layer, the plurality of radius positions each being located at a designated distance from the center of the optical disk master-forming substrate; measuring at a prescribed interval a reflectance of the laser light applied to each of the plurality of radius positions; storing, for each of the plurality of radius positions, information indicative of the designated distance from the center of the optical disk master-forming substrate and the reflectance of the laser light at the designated distance; producing recording power control data determined for each of the plurality of radius positions at the prescribed interval, the recording power control data indicative of appropriate recording laser powers greater than the recording sensitivity of the inorganic resist layer, the recording power control data based on the designated distance from the center of the optical disk master-forming substrate and the reflectance of the laser light at the designated distance, the recording laser powers varying between at least a first radius position and a second radius position based on the reflectance of the laser light at the designated distance of the first radius position and the reflectance of the laser light at the designated distance of the second radius position, and predetermined correlation data between reflectance and thermal recording sensitivity of the optical disk master; after producing the recording power control data, forming an exposure pattern on the inorganic resist layer by applying the laser light to the optical disk master-forming substrate with the varying recording laser powers of the recording power control data; and developing the inorganic resist layer provided with the exposure pattern to prepare an uneven pattern.