发明授权
- 专利标题： Magnetic recording medium and manufacturing method thereof
- 专利标题（中）： 磁记录介质及其制造方法
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申请号： US13175485申请日： 2011-07-01
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公开(公告)号： US08507116B2公开(公告)日： 2013-08-13
- 发明人: Takeshi Iwasaki , Kaori Kimura , Yoshiyuki Kamata , Masatoshi Sakurai
- 申请人： Takeshi Iwasaki , Kaori Kimura , Yoshiyuki Kamata , Masatoshi Sakurai
- 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
- 代理机构： Knobbe, Martens, Olsen & Bear, LLP
- 优先权： JP2010-171136 20100729
- 主分类号： G11B5/127
- IPC分类号： G11B5/127
摘要：
According to one embodiment, a magnetic recording medium includes a substrate, a soft magnetic layer, an underlayer, a magnetic recording layer, and a protective layer, wherein the magnetic recording layer is provided with a pattern including recording portions and non-recording portions, the non-recording portions have a composition that is equal to a composition obtained by demagnetizing the recording portions, the non-recording portions contain at least one metal element selected from the group consisting of vanadium and zirconium and at least one element selected from the group consisting of nitrogen, carbon, boron and oxygen, and the at least one element selected from the group consisting of nitrogen, carbon, boron and oxygen is contained in the non-recording portions at a higher content than the content of the at least one element selected from the group consisting of nitrogen, carbon, boron and oxygen in the recording portions.