Invention Grant
- Patent Title: Magnetic recording medium
- Patent Title (中): 磁记录介质
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Application No.: US14568423Application Date: 2014-12-12
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Publication No.: US09542967B2Publication Date: 2017-01-10
- Inventor: Noboru Sekiguchi , Tomoe Ozaki , Junichi Tachibana
- Applicant: Sony Corporation
- Applicant Address: JP Tokyo
- Assignee: Sony Corporation
- Current Assignee: Sony Corporation
- Current Assignee Address: JP Tokyo
- Agency: K&L Gates LLP
- Priority: JP2014-001233 20140107
- Main IPC: G11B5/708
- IPC: G11B5/708 ; G11B5/66 ; G11B5/65 ; G11B5/667 ; G11B5/64 ; G11B5/73

Abstract:
There is provided a magnetic recording medium including a surface having a longitudinal direction and a lateral direction. An arithmetic average roughness Ra, a ratio PSDMD,short/PSDTD,short, and a ratio PSDMD,long/PSDTD,long on the surface satisfy Ra≦3.0 nm, PSDMD,short/PSDTD,short≦0.65, and 1.3≦PSDMD,long/PSDTD,long≦2.3, in which PSDMD,short is an average value of PSD values in a range from 0.15 μm to 0.4 μm in the longitudinal direction of the surface, PSDTD,short is an average value of PSD values in a range from 0.15 μm to 0.4 μm in the lateral direction of the surface, PSDMD,long is an average value of PSD values in a range from 0.4 μm to 5.0 μm in the longitudinal direction of the surface, and PSDTD,long is an average value of PSD values in a range from 0.4 μm to 5.0 μm in the lateral direction of the surface.
Public/Granted literature
- US20150194174A1 MAGNETIC RECORDING MEDIUM Public/Granted day:2015-07-09
Information query
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