Magnetic recording medium and method for producing the same

Details Magnetic recording medium and method for producing the same Magnetic recording medium and method for producing the same

1999-12-30

2000-12-26

Ometz, David L.

Dynamic magnetic information storage or retrieval

Record medium

Disk

360131, 428694SG, 451 63, G11B 582, G11B 584, B24B 100, B24B 1926

Patent

active

061668850

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.

REFERENCES:
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patent: 5643649 (1997-07-01), Hagen et al.
patent: 5971836 (1999-10-01), Kogure et al.
patent: 5984765 (1999-11-01), Hashimoto
Proceedings of the Japan Society for Precision Engineering, pp. 19-20, 1992, Y.Hara, et al., "Ductile-Mode Machining of Glassy Carbon".

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