| 摘要 |
The present invention aims at increasing service life of an inner circumferential stamper holder in a die for molding disc substrates that is used when the disc substrates are injection molded. To that end, in the die for molding the disc substrates in which a stamper 3 is supported by at least one of a stationary die 6 and a movable die 1 , an abrasion resistant treatment is applied to at least a portion, which abuts against a side surface 3 a of a center opening of the stamper 3 , of an outer circumferential surface 4 a of the inner circumferential stamper holder 4 supporting the stamper 3.
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