Stamper for optical disc, method for manufacturing optical disc, and optical disc

摘要

This invention relates to a stamper for optical disc and a method for manufacturing an optical disc by using this stamper. A photoresist is applied to a substrate ( 2 ) and this photoresist is exposed, developed and then transferred to form a disc master which has a recess/protrusion pattern formed on its one side. The one side of the disc master ( 20 ) is etched to narrow the width of a protruding part constituting the recess/protrusion pattern, and the recess/protrusion pattern of the disc master ( 20 ) with the reduced width of the protruding part is transferred to form a stamper ( 30 ). The recess/protrusion pattern provided on the stamper ( 30 ) is transferred to form a predetermined pattern on a substrate of an optical disc.