发明授权
- 专利标题: Magnetic recording medium
- 专利标题(中): 磁记录介质
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申请号: US12594043申请日: 2008-03-28
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公开(公告)号: US08142916B2公开(公告)日: 2012-03-27
- 发明人: Teiichiro Umezawa , Masafumi Ishiyama , Kenji Ayama , Tokichiro Sato
- 申请人: Teiichiro Umezawa , Masafumi Ishiyama , Kenji Ayama , Tokichiro Sato
- 申请人地址: SG Singapore
- 专利权人: WD Media (Singapore) Pte, Ltd
- 当前专利权人: WD Media (Singapore) Pte, Ltd
- 当前专利权人地址: SG Singapore
- 优先权: JP2007-095750 20070330
- 国际申请: PCT/JP2008/056172 WO 20080328
- 国际公布: WO2008/123446 WO 20081016
- 主分类号: G11B5/66
- IPC分类号: G11B5/66
摘要:
Provided is a magnetic recording medium which maintains high S/N ratio and coercive force (Hc) and has high recording density, even with fine magnetic particles, by further improving crystal orientation of a magnetic recording layer. The magnetic recording medium is provided with an orientation control layer (16), a nonmagnetic under layer (18), and a magnetic recording layer (22) on a substrate. The orientation control layer (16) has an fcc structure and a (111) plane parallel to the substrate. The under layer (18) has an hcp structure and a (0001) plane parallel to the substrate. An atomic distance of the (111) plane of the orientation control layer (16) is −0.2 Å to +0.15 Å to a lattice spacing of the under layer (18).
公开/授权文献
- US20100119878A1 MAGNETIC RECORDING MEDIUM 公开/授权日:2010-05-13
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