JPS6464121A - Production of magnetic recording medium - Google Patents

Abstract

PURPOSE:To form a magnetic recording medium having high durability without degrading corrosion resistance by laminating a nonmagnetic protective layer consisting of a required oxide on a magnetic layer consisting of a thin ferromagnetic metallic film and subjecting the surface of the magnetic layer exposed by polishing the surface of said protective layer to an oxidation treatment. CONSTITUTION:The magnetic recording layer 2 consisting of the thin ferromagnetic metallic film is formed on a nonmagnetic substrate 1 and further, the protective layer 3 consisting of the oxide contg. at least one metal elements among the components of the layer 2 is laminated thereon. The projecting parts 4 of the layer 3 are removed by polishing to expose 5 part of the layers 2. The surface of the exposed layer 2 is subjected to the oxidation treatment to form the oxide layer 5 which contains the same metal element as the metal element of the layer 3, has the good affinity to the layer 3 and is hardly strippable is formed. The projections are thereby removed and the generation of dust is suppressed. The exposed magnetic layer is covered by the metal oxide, by which the magnetic recording medium having the high durability is formed without degrading the corrosion resistance.