Invention Grant
- Patent Title: Perpendicular magnetic recording medium and method of manufacturing same
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Application No.: US13817141Application Date: 2012-05-01
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Publication No.: US09659592B2Publication Date: 2017-05-23
- Inventor: Toyoji Ataka , Shunji Takenoiri , Sadayuki Watanabe , Hirohisa Oyama , Yasuaki Hozumi , Satoshi Takahashi
- Applicant: Toyoji Ataka , Shunji Takenoiri , Sadayuki Watanabe , Hirohisa Oyama , Yasuaki Hozumi , Satoshi Takahashi
- Applicant Address: JP Kawasaki-Shi
- Assignee: FUJI ELECTRIC CO., LTD.
- Current Assignee: FUJI ELECTRIC CO., LTD.
- Current Assignee Address: JP Kawasaki-Shi
- Agency: Rabin & Berdo, P.C.
- Priority: JP2011-125066 20110603
- International Application: PCT/JP2012/002956 WO 20120501
- International Announcement: WO2012/164825 WO 20121206
- Main IPC: G11B5/66
- IPC: G11B5/66 ; G11B5/73 ; G11B5/85 ; G11B5/851 ; G11B5/84

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.
Public/Granted literature
- US20130209836A1 PERPENDICULAR MAGNETIC RECORDING MEDIUM AND METHOD OF MANUFACTURING SAME Public/Granted day:2013-08-15
Information query
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