The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 03, 1991
Filed:
Mar. 22, 1989
Shogo Nasu, Kobe, JP;
Koji Saiki, Toyonaka, JP;
Kanegafuchi Kagaku Kogyo Kabushiki Kaisha, Osaka, JP;
Abstract
A perpendicular magnetic storage medium in which a perpendicular magnetic anisotropic film having an easy magnetization axis perpendicular to the plane thereof is formed on a substrate, wherein the perpendicular magnetic anisotropic film is a film of a sub-oxide of Fe-Co alloy, the sub-oxide has a half-value width not less than 0.7 degrees with respect to a diffracted X-ray peak caused by oxide phase observed in X-ray diffraction spectrum, and saturation magnetization in terms of 4.pi.Ms of the film is within a range from 6,000 Gauss to 13,000 Gauss. The medium has high recording/reproducing sensitivity, high recording density and high wear resistance, and can be produced easily and economically at a low substrate temperature.