Patent ID: 6653057
Filing Date: 2003-11-25
Classification: G11B,Y10S

Abstract:
A method of manufacturing a stamper for forming an optical disk substrate by applying a photoresist onto a master substrate, exposing the photoresist to light to produce a pattern by using a laser beam, and forming a guiding groove by etching using the remaining photoresist after development as a mask comprising the steps of:forming in advance at least a first thin film layer and a second thin film layer of mutually different materials sequentially on said master substrate in a multi-layer structure, wherein said second thin film layer is thicker than said first thin film layer; dry-etching said second thin film layer selectively and anisotropically until reaching said first thin film layer using the remaining photoresist as a mask; and wet-etching said first thin film layer selectively for removal thereof after the anisotropic etching to produce said guiding groove.