| 摘要 |
PURPOSE:To obtain a magnetic recording medium having excellent durability, wear resistance and lubricity by subjecting a protective film formed by a plasma polymn. method further to a heat treatment. CONSTITUTION:The protective film is formed by plasma polymn. on the surface of a thin ferromagnetic film and is then subjected to the heat treatment. More specifically, a chemical plating layer consisting of Ni-P, etc., is formed on an aluminum substrate which is a substrate in tight contact therewith and after said layer is subjected to a post treatment such as finishing by polishing, the thin ferromagnetic metallic film is formed on the surface thereof by a physical or chemical technique. A magnetic disk body 1 formed with the thin ferromagnetic metallic film on the substrate surface is then set to a counter electrode type plasma polymn. device and a plasma-polymerized film is formed as the protective film on the surface of the thin ferromagnetic metallic film deposited and formed on the substrate consisting of a high-polymer film, high-polymer sheet or metal such as aluminum. Heat is thereafter applied to the film to add strength to the film structure and to form the smoother surface of the protective film, by which the durability and wear resistance are improved. |
