Fuji Electric Co., Ltd.

Katsuya Masuda

Satoru Nakamura

Toyoji Ataka

Yuji Ando

Shinji Shirai

Teruhisa Yokosawa

Mihoyo Iwase

Yoichi Tei

Ryoichi Kadota

Manabu Shimosato

A high-density magnetic recording medium uses a nonmetallic substrate, while still providing high in-plane magnetic anisotropy and remanent coercivity. Such a medium can be formed by depositing a seed layer on a textured surface of the nonmetallic substrate in a gas mixture containing oxygen or nitrogen and an inert gas, while controlling the oxygen concentration or nitrogen concentration, and subsequently exposing the surface of the seed layer to oxygen or nitrogen.

Magnetic recording medium and manufacturing method thereof

A magnetic recording medium and method of manufacturing the same including 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. 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.

Magnetic recording medium and method of manufacturing the same

A magnetic recording medium having a carbon protective layer for protecting a magnetic layer formed on a non-magnetic base includes a liquid lubrication layer formed by coating on the carbon protective layer. The liquid lubrication layer includes a hydrocarbon containing lubricant and a perfluoropolyether containing lubricant.

Magnetic recording medium and method for manufacturing the same

Growing community of inventors

Nagano, Japan

Katsuya Masuda