Magnetic memory storage devices
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United States of America Patent
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Nov 20, 1990
Grant Date -
N/A
app pub date -
Feb 24, 1989
filing date -
Feb 24, 1989
priority date (Note) -
Expired
status (Latency Note)
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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.
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