| 摘要 |
PURPOSE:To improve the corrosion resistance of a magnetic recording medium by forming a protective layer of an org. compound on the magnetic layer of a ferromagnetic metal or alloy and carrying out heat treatment. CONSTITUTION:A magnetic layer of a ferromagnetic metal or alloy such as a Co-Ni alloy is formed on a substrate such as a polyester film. A protective layer of an org. compound is then formed on the magnetic layer by the plasma- polymn. of tetramethylsilane, the sputtering of polytetrafluoroethylene or other method and heat treatment is carried out. Since oxide having superior corrosion resistance is formed on the surface of the magnetic layer by the heat treatment, a magnetic recording medium having superior corrosion resistance and stable electromagnetic transducing characteristics is obtd.
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