Fuji Electric Co., Ltd.

Fuji Electric Device Technology Co., Ltd.

Kouichi Tsuda

Youichi Tei

Ryoji Kobayashi

Syoji Sakaguchi

An alumina nanohole array and a method of fabricating the same includes the steps of forming an aluminum thin-film on a substrate at a substrate temperature of &#x2212;80&#xb0; C. or below so that crystal grain growth is suppressed, even when a high-purity aluminum material is used, thus providing improved surface smoothness; and anodizing the aluminum thin-film. Preferably, the method additionally includes texturing by pressing a mold having an orderly array of projections against the aluminum thin-film to form pits on the aluminum thin-film which enables a larger array area to be formed. When the mold and the aluminum thin-film are held at a temperature of 150 to 200&#xb0; C., the pressure used for pit formation is reduced. A magnetic recording medium manufactured by a method therefore includes forming a magnetic layer within the nanoholes so that the medium is suitable as a bit patterned media for a perpendicular recording system.

Method of fabricating an alumina nanohole array, and method of manufacturing a magnetic recording medium

A method of manufacturing a magnetic recording medium includes the steps of forming an intermediate layer that is electrically conductive over a non-magnetic substrate; forming an aluminum-containing layer on the intermediate layer; forming a plurality of micro pits in the aluminum-containing layer; generating an alumina-containing layer by anode oxidation of the aluminum-containing layer and simultaneously forming a plurality of nano holes in the alumina-containing layer originating from the plurality of micro pits respectively to expose the intermediate layer; cleaning and drying the plurality of nano holes using a fluid selected from the group consisting of a sub- and super-critical carbon dioxide fluid; and depositing a magnetic metal selectively through the plurality of nano holes on the intermediate layer to form a plurality of magnetic recording elements that collectively form a magnetic recording layer.

Method of manufacturing a magnetic recording medium

A substrate for a recording medium suited for thermally assisted recording methods has a disc shape with a center hole and includes a silicon single-crystal supporting member; an SiOfilm formed on the silicon single-crystal supporting member; a main face having a film thickness of the SiOfilm thereon which is less than 10 nm; a substrate inner periphery end face adjacent to the center hole; a substrate inner periphery chamfer portion adjacent to the main face and to the substrate inner periphery end face; a substrate outer periphery end face positioned on the side of the main face opposite the substrate inner periphery end face; and a substrate outer periphery chamfer portion adjacent to the main face and to the substrate outer periphery end face. A magnetic recording medium includes at least the above substrate and a magnetic recording layer formed on the substrate.

Substrate for recording medium, and magnetic recording medium using same

An injection molded thermoplastic magnetic recording substrate a medium formed therewith, and a method thereof is composed of a thermoplastic or allyloxymethylstyrene type resin.

Magnetic recording medium substrate using thermoplastic allyloxymethylstyrene resin, magnetic recording medium using the substrate, and method of manufacturing the magnetic recording medium

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Matsumoto, Japan

Kouichi Tsuda