Patent ID: 7968017
Filing Date: 2011-06-28
Classification: G11B

Abstract:
1. A method for manufacturing an optical disc comprising the steps of: applying a photoresist to a substrate, exposing and developing the photoresist to form a recess/protrusion pattern on one side, and forming a disc master on which a transfer pattern is formed on the basis of the substrate; etching one side of said disc master to reduce the width of a protruding part constituting said transfer pattern such that the surface roughness of the side of the disc master is 0.4 nm or less; transferring the transfer pattern of the disc master with the reduced width of said protruding part onto a first substrate to form a stamper; and transferring the recess/protrusion pattern provided on said stamper to reduce a predetermined pattern onto a second substrate of an optical disc, wherein, the photoresist is applied to a thickness of approximately 20 nm on said substrate, and the exposure is carried out using a laser beam with a wavelength of 266 nm.