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:
Oct. 11, 2011
Filed:
Aug. 17, 2009
Shinichi Ishibashi, Ichihara, JP;
Migaku Takahashi, Sendai, JP;
Shin Saito, Sendai, JP;
Yuzo Sasaki, Ichihara, JP;
Atsushi Hashimoto, Chiba, JP;
Gohei Kurokawa, Ichihara, JP;
Tomoyuki Maeda, Kawasaki, JP;
Akihiko Takeo, Tokyo, JP;
Shinichi Ishibashi, Ichihara, JP;
Migaku Takahashi, Sendai, JP;
Shin Saito, Sendai, JP;
Yuzo Sasaki, Ichihara, JP;
Atsushi Hashimoto, Chiba, JP;
Gohei Kurokawa, Ichihara, JP;
Tomoyuki Maeda, Kawasaki, JP;
Akihiko Takeo, Tokyo, JP;
Showa Denko K.K., Tokyo, JP;
Kabushiki Kaisha Toshiba, Tokyo, JP;
Tohoku University, Miyagi-Ken, JP;
Abstract
The present invention provides a magnetic recording medium which is capable of improving the perpendicular orientation of a perpendicular magnetic recording layer while maintaining a writing performance during recording and obtaining both an improvement in the perpendicular orientation and fine magnetic crystal particles with a uniform diameter, and which enables information to be recorded or reproduced at high density, a method of manufacturing the same, and a magnetic recording/reproducing apparatus. A magnetic recording mediumaccording to the present invention includes at least a soft magnetic underlayer, an orientation control layer, a magnetic recording layer, and a protective layerformed on a non-magnetic substrate. The orientation control layerhas a seed layerand an intermediate layer. The seed layeris made of a Cu—Ti alloy that has a face-centered cubic structure and includes Cu as a main component. The Cu—Ti alloy has a (111) crystal plane oriented substantially perpendicular to the surface of the non-magnetic substrateand has a pseudo-hexagonal structure.