Magnetic disc
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United States of America Patent
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-
Jan 21, 1992
Issued Date -
N/A
app pub date -
Sep 20, 1990
filing date -
Feb 17, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A magnetic disc with good abrasion resistance and improved durability, which comprises a non-magnetic substrate, a magnetic layer comprising a metal magnetic powder formed on one side of the substrate and a coating comprising an inorganic powder having a Mohs hardness of not less than 4 formed on the other, back side of the substrate, which has good abrasion resistance and improved durability.
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