Substrate for magnetic recording medium, manufacturing method thereof, and magnetic recording medium

摘要

A slowly advancing tape-shaped matrix is pressed into contact with a surface of a rapidly rotating non-magnetic substrate for a magnetic recording medium. An abrasive slurry is added to the matrix. The area contact rate between the matrix and the surface, as well as the contact pressure per unit area between the matrix and the surface are regulated to both polish and slightly roughen the surface in a single process. In the case of a glass presubstrate, the glass is chemically strengthened before being surface-treated.