DISK MOLDING MOLD, INNER HOLDER AND MANUFACTURING METHOD OF DISK MOLDING MOLD

摘要

PROBLEM TO BE SOLVED: To achieve improved appearance of a disk substrate so as to upgrade quality of the disk substrate. SOLUTION: A disk molding mold comprises a mirror surfacing machine 16, a stamper 29 with a hole formed in its center and attached on front end face s1 of the mirror surfacing machine 16 and an inner holder 60 which holds the stamper 29 by being press fitted to the hole. The inner holder 60 has an inner holder body 61 and a jutted section formed integrally with the inner holder 60 by jutting towards radial direction from a peripheral edge on front end of the inner holder body 61. The stamper 29 can be held stably with the inner holder 60 without enlarging level difference formed between the stamper 29 and the jutted section since at least one of the stamper 29 and the inner holder 60 is subjected to plastic deformation accompanied by the press fitting. COPYRIGHT: (C)2011,JPO&INPIT