Invention Grant
US07826176B2 Magnetic recording medium with thicker protective film in edge areas and magnetic recording apparatus using the medium
有权
在边缘区域具有较厚保护膜的磁记录介质和使用介质的磁记录装置
- Patent Title: Magnetic recording medium with thicker protective film in edge areas and magnetic recording apparatus using the medium
- Patent Title (中): 在边缘区域具有较厚保护膜的磁记录介质和使用介质的磁记录装置
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Application No.: US11723977Application Date: 2007-03-22
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Publication No.: US07826176B2Publication Date: 2010-11-02
- Inventor: Satoshi Shirotori , Masatoshi Sakurai , Akira Kikitsu , Yoshiyuki Kamata , Kaori Kimura
- Applicant: Satoshi Shirotori , Masatoshi Sakurai , Akira Kikitsu , Yoshiyuki Kamata , Kaori Kimura
- Applicant Address: JP Tokyo
- Assignee: Kabushiki Kaisha Toshiba
- Current Assignee: Kabushiki Kaisha Toshiba
- Current Assignee Address: JP Tokyo
- Agency: Nixon & Vanderhye, PC
- Priority: JP2006-094356 20060330
- Main IPC: G11B5/72
- IPC: G11B5/72 ; G11B5/82
Abstract:
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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Information query
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