Patent ID: 8110343
Filing Date: 2012-02-07
Classification: G11B

Abstract:
1. A method of manufacturing an optical recording and reproducing medium manufacturing stamper for molding an optical recording and reproducing medium substrate having a wobbling groove formed along a recording track, comprising: manufacturing an optical recording and reproducing medium manufacturing master, including developing a photosensitive layer using photoresist on a master substrate after said photoresist has been exposed with a pattern corresponding to a predetermined uneven pattern; forming a stamper layer on the optical recording and reproducing medium manufacturing master; releasing the stamper layer from the optical recording and reproducing medium manufacturing master to form a stamper; and etching the stamper to microminiaturize a width of a groove pattern formed in the stamper corresponding to said wobbling groove, wherein the etching increases a land surface roughness of the groove pattern to be within a range from 0.45 nm to 0.85 nm.