发明授权
- 专利标题： Magnetic recording medium, magnetic recording and reproducing apparatus, method for manufacturing magnetic recording medium, and method for checking magnetic recording medium
- 专利标题（中）： 磁记录介质，磁记录和再现装置，磁记录介质的制造方法和磁记录介质的检查方法
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申请号： US12003917申请日： 2008-01-03
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公开(公告)号： US08169742B2公开(公告)日： 2012-05-01
- 发明人: Daisuke Yoshitoku , Minoru Fujita , Narutoshi Fukuzawa
- 申请人： Daisuke Yoshitoku , Minoru Fujita , Narutoshi Fukuzawa
- 申请人地址： JP Tokyo
- 专利权人： TDK Corporation
- 当前专利权人： TDK Corporation
- 当前专利权人地址： JP Tokyo
- 代理机构： Oliff & Berridge, PLC
- 优先权： JP2007-007462 20070116
- 主分类号： G11B5/82
- IPC分类号： G11B5/82
摘要：
A magnetic recording medium is provided, which has recording layers having concavo-convex patterns formed on both sides of a substrate and can easily distinguish one face from the other face. A magnetic recording and reproducing apparatus having the magnetic recording medium is also provided. The magnetic recording medium includes a substrate, a first recording layer formed in a first concavo-convex pattern on a side of a first face, and a second recording layer formed in a second concavo-convex pattern on a side of a second face. The magnetic recording medium also includes a distinction element which can distinguish the first face from the second face. At least part of the distinction element is disposed in a non-recording area adjacent to at least one of an inner part and an outer part of a recording area in a radial direction.