Patent ID: 7029772
Filing Date: 2006-04-18
Classification: G11B

Abstract:
1. A magnetic recording medium comprising (1) a substrate; (2) a carbon-containing undercoat film formed thereon; and (3) a perpendicular magnetic film, in which most of easy-magnetization axes are oriented vertically with respect to the substrate, formed directly on the undercoat film, wherein the perpendicular magnetic film has a single or multilayer structure and is formed through a plurality of sputtering depositions using at least one element selected from the group consisting of Pt and Pd and through a plurality of sputtering depositions using a Co-containing material, and the carbon undercoat film has a thickness of 30 nm to 100 nm, and wherein a sputter deposition of the at least one element selected from the group consisting of Pt and Pd alternates with a sputter deposition of the Co-containing material.