Patent ID: 6534164
Filing Date: 2003-03-18
Classification: G11B,H04B,Y10S,Y10T

Abstract:
A perpendicular recording medium comprising:a substrate, a first perpendicular magnetization film consisting of a Co alloy, at least one underlayer formed between the substrate and the perpendicular magnetization film, and a multi-layered second perpendicular magnetization film formed on the first perpendicular magnetization film, wherein an exchange coupling force in a longitudinal direction of said multi-layered second perpendicular film is greater than that of said first perpendicular magnetization film, a total thickness of said first perpendicular magnetization film and said multi-layered second perpendicular magnetization films is within a range of 7 nm to 100 nm, and the thickness of the multi-layered second perpendicular magnetization film is less than that of the first perpendicular magnetization film.