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:
Jun. 23, 2015
Filed:
May. 23, 2012
Tetsuya Osaka, Tokyo, JP;
Atsushi Sugiyama, Kawaguchi, JP;
Takuma Hachisu, Ichihara, JP;
Tomoo Shige, Chiba, JP;
Masato Fukushima, Chiba, JP;
Akira Yamane, Ichihara, JP;
Akira Sakawaki, Ichihara, JP;
Tetsuya Osaka, Tokyo, JP;
Atsushi Sugiyama, Kawaguchi, JP;
Takuma Hachisu, Ichihara, JP;
Tomoo Shige, Chiba, JP;
Masato Fukushima, Chiba, JP;
Akira Yamane, Ichihara, JP;
Akira Sakawaki, Ichihara, JP;
SHOWA DENKO K.K., Tokyo, JP;
WASEDA UNIVERSITY, Tokyo, JP;
Abstract
According to the present invention, a magnetic recording medium is provided including a disk-shaped non-magnetic substrate and at least a perpendicular magnetic layer formed on the disk-shaped non-magnetic substrate, wherein the perpendicular magnetic layer has a structure in which an FePt or CoPt nanoparticle array is formed on a formation surface, on which a plurality of striations each having a circumferential directional component are formed, by a texturing treatment; a manufacturing method thereof; and a magnetic record/reproduction apparatus including the magnetic recording medium or a magnetic recording medium manufactured according to the manufacturing method.