发明授权
US09245563B2 Magnetic medium with an orientation control layer 有权
具有取向控制层的磁性介质

  • 专利标题: Magnetic medium with an orientation control layer
  • 专利标题(中): 具有取向控制层的磁性介质
  • 申请号: US14114641
    申请日: 2012-05-14
  • 公开(公告)号: US09245563B2
    公开(公告)日: 2016-01-26
  • 发明人: Atsushi Hashimoto
  • 申请人: Atsushi Hashimoto
  • 申请人地址: JP Tokyo
  • 专利权人: SHOWA DENKO K.K.
  • 当前专利权人: SHOWA DENKO K.K.
  • 当前专利权人地址: JP Tokyo
  • 代理机构: Sughrue Mion, PLLC
  • 优先权: JP2011-110354 20110517
  • 国际申请: PCT/JP2012/062277 WO 20120514
  • 国际公布: WO2012/157600 WO 20121122
  • 主分类号: G11B5/74
  • IPC分类号: G11B5/74 G11B23/00 G11B5/667 G11B5/73
Magnetic medium with an orientation control layer
摘要:
Provided is a magnetic recording medium which maintains high vertical orientation of a vertical magnetic layer, and which is capable of realizing high recording densification. In the magnetic recording medium, at least a soft magnetic underlying layer (30), seed layers (31, 32), an orientation control layer (33), and a vertical magnetic layer are laminated in this order on the non-magnetic substrate. The soft magnetic underlying layer (30) has an amorphous or microcrystalline structure. The seed layers (31, 32) include a first seed layer (31) formed from a metal oxide or a metal nitride, and a second seed layer (32) which is formed on the first seed layer and is formed from a metal formed with an island-shape or a net shape. In the orientation control layer (33) and the vertical magnetic layer, respective crystal grains constitute columnar crystals that are continuous in a thickness direction based on the second seed layer (32).
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