Method for manufacturing optical disc master and method for manufacturing optical disc

Abstract

An optical disc master having a resist layer composed of a resist material including an incomplete oxide of a transition metal on a substrate, the oxygen content of the incomplete oxide being smaller than the oxygen content of the stoichiometric composition corresponding to a valence of the transition metal, wherein, (a) the resist layer selectively exposed, according to a recording signal pattern, to a light beam with an irradiation power that is less than an irradiation threshold power at which exposure of the resist starts, and (b) the resist layer is formed into a predetermined irregular pattern.

1 . An optical disc master, comprising:
 a resist layer composed of a resist material including an incomplete oxide of a transition metal on a substrate, the oxygen content of the incomplete oxide being smaller than the oxygen content of the stoichiometric composition corresponding to a valence of the transition metal,   wherein,
 the resist layer selectively exposed, according to a recording signal pattern, to a light beam with an irradiation power that is less than an irradiation threshold power at which exposure of the resist starts, and 
 the resist layer is formed into a predetermined irregular pattern.