Thin-film hard disk magnetic medium

Details Thin-film hard disk magnetic medium Thin-film hard disk magnetic medium

1991-09-09

1993-05-11

Anderson, Bruce C.

Dynamic magnetic information storage or retrieval

Record medium

Disk

428 64, 428694BP, G11B 582

Patent

active

052106730

ABSTRACT:
A thin-film hard disk magnetic medium comprising a magnetic recording film made from a magnetic metal alloy formed on a circumferentially textured surface of a substrate, in order that the surface of the magnetic recording layer is provided with a surface roughness, Rmax of 100 .ANG. to 400 .ANG., and adjacent grooves form a space of 0.5 .mu.m to 3 .mu.m measured in the radial direction of the substrate.

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patent: 5119258 (1992-06-01), Tsai et al.
patent: 5144512 (1992-09-01), Ota et al.
English Abstract of EP 438-177 A, filed Jan. 18, 1991.

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