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:
Apr. 26, 2005
Filed:
Sep. 13, 2002
Kenji Shimizu, Ichihara, JP;
Akira Sakawaki, Ichihara, JP;
Hui Yang, Ichihara, JP;
Hiro Mochizuki, Ichihara, JP;
Hiroshi Sakai, Ichihara, JP;
Takashi Hikosaka, Tokyo, JP;
Soichi Oikawa, Chiba, JP;
Kenji Shimizu, Ichihara, JP;
Akira Sakawaki, Ichihara, JP;
Hui Yang, Ichihara, JP;
Hiro Mochizuki, Ichihara, JP;
Hiroshi Sakai, Ichihara, JP;
Takashi Hikosaka, Tokyo, JP;
Soichi Oikawa, Chiba, JP;
Showa Denko K.K., Tokyo, JP;
Toshiba Corporation, Tokyo, JP;
Abstract
A magnetic recording medium having excellent magnetic read/write characteristics and thermal stability characteristics, and a method of manufacturing therefor, and a magnetic read/write apparatus are provided. This magnetic recording medium comprises an orientation control filmthat controls the orientation of a film provided directly thereabove, a perpendicular magnetic filmof which the axis of easy magnetization is generally oriented perpendicular to a substrate, and a protective filmthat are provided on a non-magnetic substratewherein the orientation control filmis made of a non-magnetic material which contains 33 to 80 at % of Ni and one or more kinds of elements selected from Sc, Y, Ti, Zr, Hf, Nb and Ta.