发明申请
- 专利标题： Magnetic recording media, magnetic recording apparatus, and method for manufacturing magnetic recording media
- 专利标题（中）： 磁记录介质，磁记录装置和磁记录介质的制造方法
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申请号： US11723977申请日： 2007-03-22
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公开(公告)号： US20070230055A1公开(公告)日： 2007-10-04
- 发明人: Satoshi Shirotori , Masatoshi Sakurai , Akira Kikitsu , Yoshiyuki Kamata , Kaori Kimura
- 申请人： Satoshi Shirotori , Masatoshi Sakurai , Akira Kikitsu , Yoshiyuki Kamata , Kaori Kimura
- 申请人地址： JP Tokyo
- 专利权人： Kabushiki Kaisha Toshiba
- 当前专利权人： Kabushiki Kaisha Toshiba
- 当前专利权人地址： JP Tokyo
- 优先权： JP2006-094356 20060330
- 主分类号： G11B5/82
- IPC分类号： G11B5/82
摘要：
A magnetic recording media includes a toroidal substrate, a surface thereof is divided into a recording area located in a central part between an outer peripheral edge and an inner peripheral edge, edge areas located within 100 μm or more and 2,000 μm or less from the outer and inner peripheral edges, respectively, and adjacent areas located between the edge areas and the recording area, respectively, a magnetic film on the substrate, and a protective film on the magnetic film, in which the magnetic film is thinner in the edge areas than that in the adjacent areas, and at least a part of the protective film in the edge areas is thicker than that in the adjacent areas.
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