COATING METHOD, LAMINATION METHOD, METHOD AND APPARATUS FOR PRODUCING OPTICAL DISK

摘要

PROBLEM TO BE SOLVED: To improve the yield of a laminated disk substrate by preventing the abrupt falling of a cationic ultraviolet curable composition from a nozzle and the generation of nonuniformity in thickness in the circumferential direction of an adhesive layer. SOLUTION: The first disk substrate 1a is coated with a prescribed amount of a cationic ultraviolet curable composition 48 while the composition dropped from a dispenser 41 is irradiated with ultraviolet rays. After that, the retained composition 48 left at the tip of the dispenser 41 is removed to prevent the falling of the composition 48 on the first disk substrate 1a.