Magnetic recording medium
AssigneeKao Corporation
InventorsNoriyuki Kitaori, Osamu Yoshida, Katsumi Sasaki, Junko Ishikawa, Katsumi Endo
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Abstract
A magnetic recording medium comprising a substrate, a magnetic layer, a protective layer and a lubricant layer, wherein the magnetic layer is coated on the substrate, the protective layer is coated on the magnetic layer, the lubricant layer is coated on the protective layer, the magnetic layer is an Fe--C--O metal magnetic layer containing Fe, C and O, the protective layer is a diamond-like carbon layer and the lubricant is a fluorine-contained lubricant. The magnetic recording medium using an inexpensive Fe as a magnetic material, has excellent electromagnetic conversion characteristic, durability, corrosion resistance and running capability.
Claims20
A magnetic recording medium comprising a substrate, a magnetic layer, a protective layer and a lubricant layer, wherein;
- said magnetic layer is coated on said substrate,
- said protective layer is coated on said magnetic layer,
- said lubricant layer is coated on said protective layer,
- said magnetic layer is an Fe--C--O metal magnetic layer containing Fe, C and O,
- said protective layer is a diamond-like carbon layer, and
- said lubricant is a fluorine-contained lubricant.
A magnetic recording medium comprising a substrate, a magnetic layer, a protective layer, a back coat layer and a lubricant layer, wherein
- said magnetic layer is coated on one surface of said substrate,
- said protective layer is coated on said magnetic layer,
- said back coat layer is coated on the other surface of said substrate,
- said lubricant layer is coated on said protective layer and said back coat layer,
- said magnetic layer is an Fe--C--O metal magnetic layer composing 50 to 90 at. % of Fe, 5 to 35 at. % of C and 5 to 35 at. % of O,
- said protective layer is a diamond-like carbon layer,
- said back coat layer is a non-magnetic metallic layer and
- said lubricant is a fluorine-contained lubricant.
Dependencies are inferred from the claim text.