Patent Number: 6,166,885

Title: Magnetic recording medium and method for producing the same

Abstract: The method for producing a magnetic recording medium, includes the steps of (a) subjecting surfaces of a substrate to grinding by a ductile-mode grinding with a grinding wheel having a setting depth of cut of from 0.05 to 20 .mu.m, to give a surface-worked substrate having grinding marks of arc patterns; and (b) forming recording medium-constituting layers at least comprising an under layer, a magnetic layer, and a protective layer on the surface-worked substrate, or on a mirror-polished substrate obtained by further subjecting the surface-worked substrate to a finish polishing. The resulting magnetic recording medium is constituted by (a) the surface-worked substrate or the mirror-polished substrate; and (b) recording medium-constituting layers at least comprising an under layer, a magnetic layer, and a protective layer, wherein the recording medium-constituting layers are formed on the surface-worked substrate, or on a mirror-polished substrate.

Inventors: Yamamoto; Yuzo (Tochigi-ken, JP), Noda; Akira (Tochigi-ken, JP)

Assignee: Kao Corporation

International Classification: B24B 53/00 (20060101); G11B 5/73 (20060101); B24B 7/20 (20060101); B24B 7/22 (20060101); G11B 5/84 (20060101); G11B 5/62 (20060101); G11B 005/82 (); G11B 005/84 (); B24B 001/00 (); B24B 019/26 ()

Expiration Date: 12/26/2013