Patent ID: 7829166

Claim:
A process for manufacturing an optical disk having a track pitch of 0.74 μm or less, comprising the steps of: (1) preparing a resin composition by adding 0.005 to 0.2 part by weight of monoglyceride behenate to 100 parts by weight of an aromatic polycarbonate resin; (2) injection molding the resin composition to obtain a substrate having pit tracks, groove tracks, land tracks or land/groove tracks which are arranged at the same interval as the track pitch in the radial direction; and (3) forming an information recording/reproduction layer on the pits, grooves, lands or grooves/lands of the substrate, wherein the aromatic polycarbonate resin has a sodium metal content of 0.0005 to 0.05 ppm and a viscosity average molecular weight of 10,000 to 20,000, and the monoglyceride behenate has a sodium metal content of less than 1 ppm.