Magnetic recording medium with protective layer using graphite fluoride and method of producing same
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United States of America Patent
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Jun 13, 1989
Grant Date -
N/A
app pub date -
Apr 13, 1988
filing date -
Apr 24, 1987
priority date (Note) -
Expired
status (Latency Note)
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Abstract
In a magnetic recording medium such as a magnetic disk, a protective coating excellent in both mechanical durability and corrosion resistance is provided on a layer of a magnetic recording material, which may be a metal film, by jointly using graphite fluoride and an inorganic nonmetallic hard compound which can be selected from oxides such as SiO.sub.2 and Al.sub.2 O.sub.3, nitrides such as SiN and AlN and carbides such as SiC and WC. The protective coating may be either a single layer of a mixture of graphite fluoride and a hard compound formed by co-sputter deposition or a two-layer coating made up of an inner layer of a hard compound and an outer layer of sputter deposited graphite fluoride.
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