Perpendicular magnetic recording disk and method of producing same

Abstract

A perpendicular magnetic recording disk is produced by forming a soft magnetic layer on a non-magnetic substrate either directly or through a foundation layer in between, forming texturing marks on the surface of this soft magnetic layer, forming a perpendicular magnetic recording layer on the soft magnetic layer either directly or through an intermediate layer in between, and forming a protective layer on the perpendicular recording layer. A texturing process is carried out such that the average surface roughness of the soft magnetic layer is 0.5 Å-5.0 Å, and the line density of the texturing marks is 30 lines/μm or more.

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