Patent ID: 7744966
Filing Date: 2010-06-29
Classification: G11B,Y10T

Abstract:
1. A production process of a magnetic recording medium, which comprises a perpendicular magnetic recording layer and a carbon protective layer on a substrate, wherein the perpendicular magnetic recording layer is formed from a magnetic material containing a Co alloy and an oxide material, comprising: a perpendicular magnetic recording layer formation process of forming the perpendicular magnetic recording layer on the substrate; a heating process of heating the substrate on which has been formed the perpendicular magnetic recording layer; and, a protective layer formation process of forming the carbon protective layer by the plasma CVD method on the substrate on which is formed the perpendicular magnetic recording layer, wherein in the perpendicular magnetic recording layer formation process, a temperature during formation of the perpendicular magnetic recording layer is less than 80° C, in the protective layer formation process, a film deposition temperature during formation or the carbon protective layer is 80° C. or higher, the perpendicular magnetic recording layer has a structure in which a nonmagnetic layer, consisting of an oxide material, surrounds a magnetic layer, consisting of a Co alloy, and the oxide material is any one of, or is two or more among, SiO