Magnetic disc with low-friction glass substrate

Details Magnetic disc with low-friction glass substrate Magnetic disc with low-friction glass substrate

1990-02-06

1992-06-02

Wolff, John H.

Dynamic magnetic information storage or retrieval

Record medium

Disk

428694, 428900, G11B 582, G11B 5712, G11B 572

Patent

active

051192586

ABSTRACT:
A thin-film medium formed on a low-friction glass substrate. The substrate is micro-roughened by plasma etching, under conditions which produce a desired surface density of zero crossings and depth of microscopic surface irregularities.

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patent: 4898774 (1990-02-01), Yamashita et al.
patent: 4908727 (1990-03-01), Ezaki et al.
patent: 4954904 (1990-09-01), Goor

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