Patent ID: 6849164

Claim:
A method of manufacturing a magnetic recording medium comprising: directly texturing a surface of a non-magnetic substrate made of a glass material to form circular concentric grooves thereon; forming a seed layer on the non-magnetic substrate; forming an under layer on the seed layer; forming a magnetic layer on the under layer; and forming a protective layer on the magnetic layer, wherein the textured non-magnetic substrate has at least five circular concentric grooves per 1 square um span on the surface thereof, and has an average surface roughness Ra of 0.2 to 1 nm, exposing the seed layer to a mixed gas comprising an inert gas and oxygen prior to forming the under layer, and a ratio of an in-plane remanent magnetization in a circumferential direction of the magnetic recording medium to an in-plane remanent magnetization in a radial direction of the magnetic recording medium is equal to or greater than 1.05.