Vertical magnetic recording system using rigid disk

Details Vertical magnetic recording system using rigid disk Vertical magnetic recording system using rigid disk

1986-06-09

1989-02-07

Hecker, Stuart N.

Dynamic magnetic information storage or retrieval

Record transport with head stationary during transducing

Drum record

360135, G11B 560, G11B 1564, G11B 1732, G11B 2120

Patent

active

048035777

ABSTRACT:
A vertical recording system using a rigid disk medium with high recording density has a substrate made of alumina silicate resin glass and a vertical magnetic anisotropic film located on said substrate. The anisotropic film has an easy axis of magnetization in the thickness direction of the film, and the hard axis of magnetization in the film plane. The maximum surface roughness R.sub.max of said disk is less than 50 .ANG., and a magnetic recording head which moves relative to the medium operates with said head contacted with the medium. A recording density higher than 200 KFRPI (kilo flux reversal per inch) is obtained by the present invention.

REFERENCES:
patent: 4327387 (1982-04-01), Plotto
patent: 4590119 (1986-05-01), Kauakami et al.
patent: 4619856 (1986-10-01), Kamada et al.
patent: 4633351 (1986-12-01), Bardos et al.

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