Invention Grant
- Patent Title: Magnetic recording medium and magnetic storage apparatus
- Patent Title (中): 磁记录介质和磁存储装置
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Application No.: US13894558Application Date: 2013-05-15
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Publication No.: US08804285B2Publication Date: 2014-08-12
- Inventor: Hideaki Takahoshi , Daisuke Amiya , Hiroshi Sakai
- Applicant: Showa Denko K.K.
- Applicant Address: JP Tokyo
- Assignee: Showa Denko K.K.
- Current Assignee: Showa Denko K.K.
- Current Assignee Address: JP Tokyo
- Agency: IPUSA, PLLC
- Priority: JP2012-121358 20120528
- Main IPC: G11B5/738
- IPC: G11B5/738 ; G11B5/65 ; G11B5/66

Abstract:
A magnetic recording medium may include an orientation control layer, a lower recording layer, an intermediate layer, and an upper recording layer that are stacked. The lower recording layer may have a coercivity higher than that of the upper recording layer, and the intermediate layer may include a layer including a magnetic material and having a saturation magnetization of 50 emu/cc or higher. The upper recording layer may include columnar crystals continuous with crystal particles forming the intermediate layer in a direction in which the layers are stacked.
Public/Granted literature
- US20130314814A1 MAGNETIC RECORDING MEDIUM AND MAGNETIC STORAGE APPARATUS Public/Granted day:2013-11-28
Information query
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