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. 19, 2011
Filed:
Sep. 08, 2008
Shunji Ishio, Akita, JP;
Hitoshi Saito, Akita, JP;
Takashi Hasegawa, Akita, JP;
Iwao Okamoto, Higashine, JP;
Naoya Yamamoto, Kawasaki, JP;
Shunji Ishio, Akita, JP;
Hitoshi Saito, Akita, JP;
Takashi Hasegawa, Akita, JP;
Iwao Okamoto, Higashine, JP;
Naoya Yamamoto, Kawasaki, JP;
Showa Denko K.K., Tokyo, JP;
National University Corporation Akita University, Akita, JP;
Abstract
A magnetic recording medium for use in digital magnetic recording, which comprises a nonmagnetic substrate having deposited thereon a magnetic layer, wherein with respect to the in-plane direction, the magnetic recording layer comprises a plurality of ferromagnetic regions separated from each other by an antiferromagnetic region. A production method of the magnetic recording medium and a magnetic disc apparatus are also disclosed.