Magnetic memory storage devices

Details Magnetic memory storage devices Magnetic memory storage devices

1989-02-24

1990-11-20

Dixon, Jr., William R.

Compositions: ceramic

Ceramic compositions

Devitrified glass-ceramics

428692, 428693, 428702, C03C 1014

Patent

active

049719327

ABSTRACT:
The present invention is related to the fabrication of a magnetic memory storage device consisting essentially of a head pad and a rigid information disk, which disk consists essentially of a rigid substrate having a coating of magnetic media on the surface thereof facing the head pad. More particularly, this invention is directed to a substrate for use in the disk. The substrate is selected from two different groups of glass-ceramics: the first group contains a sheet silicate as the predominant crystal phase; and the second group contains a chain silicate as the predominant crystal phase.

REFERENCES:
patent: 4386162 (1983-05-01), Beall
patent: 4464475 (1984-08-01), Beall et al.
patent: 4467039 (1984-08-01), Beall et al.
patent: 4608348 (1986-08-01), Beall et al.
patent: 4690846 (1987-09-01), Wada et al.

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