Production manner of the die and the glass substrate for glass substrate formation and production manner of the glass substrate for information record media, pressing forming the production mannered null

摘要

PROBLEM TO BE SOLVED: To provide a die for molding a glass substrate preventing cracks in a glass substrate when the substrate is released from the die in the method for manufacturing a glass substrate by press-forming fused glass, to provide a method for manufacturing a glass substrate using the die, a method for manufacturing a glass substrate for an information recording medium using the glass substrate manufactured by the above method, and to provide a method for manufacturing an information recording medium, a glass substrate for an information recording medium, and an information recording medium.;SOLUTION: The die for molding the glass substrate is to be used as an upper or a lower die for manufacturing a glass substrate by press forming fused glass, wherein the molding face of the die for molding the glass substrate has a pattern comprising a rough surface portion.;COPYRIGHT: (C)2010,JPO&INPIT