| 摘要 |
A method of forming a protective film of a magnetic recording medium is provided that achieves a good bonding characteristic with a lubricant film and at the same time, suppressing adhesion of contamination gases, to attain a reduced thickness of the magnetic recording medium. The method includes forming a protective film on a lamination including a substrate and a metallic film layer formed on the substrate, by means of a plasma CVD method using a raw material of a hydrocarbon gas, and performing a surface treatment on the protective film. The surface treatment includes a plasma treatment with argon gas, and a plasma treatment with a gas containing at least nitrogen gas.
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