Magneto-Optical Disk by Contact Printing Method

Abstract

A glass substrate has many advantages as an optical disk substrate. On a glass substrate, pits and grooves can be formed directly by a laser cutting machine and reactive etching.1) A highly reliable glass substrate can be obtained by this method, however, there is a problem of low productivity. It takes more than 30 minutes for patterning by laser cutting machine. This paper describes a contact printing method which can improve the productivity of conventional patterning, and discusses the signal performance of magneto-optical disks using a substrate prepared by the contact printing method.