Nippon Telegraph and Telephone Public Corporation

Fujitsu Corporation

Akira Terada

Yoshikazu Ishii

Susumu Kawakami

Nobuo Inagaki

Seizi Hattori

Mitsutoshi Hoshino

Shungo Sugawara

Wakatake Matsuda

Akira Nohara

Magnetic recording member having a magnetic storage layer covered by composite overlaying layers including an intermediate layer and a lubricant layer. The thin intermediate layer is formed by coating an aminosilane or epoxysilane compound directly or indirectly over the magnetic layer. The lubricant layer is formed over the intermediate layer by coating a lubricant made of a fluorinated hydrocarbon polymer having a terminal carboxyl or sulfonic acid group. The lubricant layer is chemically coupled with the intermediate layer by reacting the terminal carboxy or sulfonic acid group with the aminosilane or epoxysilane compound of the lubricant layer at room temperature or by heating, whereby the lubricant layer is stabilized to suppress deterioration of the lubricant layer and to suppress the reduction in lubricating property due to dispersion. With the stable lubricant layer according to the invention, abrasion of magnetic head slider slider and magnetic disc can be reduced and stiction of the head slider slider to the disc can be eliminated to preclude impairment of damage of the disc otherwise caused by head slider slider crash.

Magnetic recording member and process for manufacturing the same

A method of roducing .gamma.-Fe.sub.2 O.sub.3 magnetic disk medium of continuous thin film is provided, in which a deposition source is deposited on an opposed Al-alloy substrate by means of a reactive vacuum deposition technique and the deposited film is thermally treated so as to be the magnetic disk medium. As the deposition source, a ferroalloy containing about 1 to 10 at.% Ti and about 0.5 to 5 at.% Co is employed.

Method of producing magnetic thin film

Growing community of inventors

Mito, Japan

Akira Terada