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:
May. 23, 2017
Filed:
May. 01, 2012
Toyoji Ataka, Kedah Darul Aman, MY;
Shunji Takenoiri, Minami-Alps, JP;
Sadayuki Watanabe, Tokyo, JP;
Hirohisa Oyama, Kedah Darul Aman, MY;
Yasuaki Hozumi, Tokyo, JP;
Satoshi Takahashi, Tokyo, JP;
Toyoji Ataka, Kedah Darul Aman, MY;
Shunji Takenoiri, Minami-Alps, JP;
Sadayuki Watanabe, Tokyo, JP;
Hirohisa Oyama, Kedah Darul Aman, MY;
Yasuaki Hozumi, Tokyo, JP;
Satoshi Takahashi, Tokyo, JP;
FUJI ELECTRIC CO., LTD., Kawasaki-Shi, JP;
Abstract
A perpendicular magnetic recording medium exhibits reduced noise and improved performance in such measures as SN ratio, and can realize high magnetic recording densities. In the perpendicular magnetic recording medium, at least a first nonmagnetic intermediate layer, second nonmagnetic intermediate layer, and magnetic recording layer are stacked in order on a nonmagnetic substrate. The first nonmagnetic intermediate layer is formed from a CoCrRuW alloy, and the second nonmagnetic intermediate layer is formed from an Ru-base alloy.