Magnetic recording medium with protective layer using graphite f

Details Magnetic recording medium with protective layer using graphite f Magnetic recording medium with protective layer using graphite f

1988-04-13

1989-06-13

Thibodeau, Paul J.

Stock material or miscellaneous articles

Composite

Of inorganic material

428695, 428900, G11B 564

Patent

active

048392448

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.

REFERENCES:
patent: 4411963 (1983-10-01), Aine
patent: 4503125 (1985-03-01), Nelson
patent: 4554217 (1985-11-01), Grimm
patent: 4556604 (1985-12-01), Ohbayashi
patent: 4621016 (1986-11-01), Kawata
patent: 4647494 (1987-03-01), Meyerson
patent: 4680218 (1987-07-01), Kimura
patent: 4713279 (1987-12-01), Fujiwara

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