Patent ID: 8119043

Claim:
A method of making a master for manufacturing an optical disc, comprising: exposing an inorganic resist layer, said inorganic resist layer including an incomplete oxide of tungsten and molybdenum in a ratio of 80 to 20 and including 60 percent atomic oxygen, formed on a substrate to recording laser light modulated by an information signal corresponding to an information signal of an information concave and convex pattern formed on said optical disc to form an exposed pattern corresponding to said information concave and convex pattern of said optical disc, and performing development processing on said inorganic resist layer to form a concave and convex pattern corresponding to said information concave and convex pattern of said inorganic resist layer, wherein a trial exposure is performed on a non-recording area of said resist layer, evaluation laser light is irradiated on the non-recording area of said resist layer to evaluate a recording signal characteristic of said resist layer from the reflected light, and based on an evaluation result, an adjustment of an exposure focusing position is performed to determine an optimum focus position of recording laser light which is later performed.