发明申请
- 专利标题: Magnetic disk and magnetic disk manufacturing method
- 专利标题(中): 磁盘和磁盘制造方法
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申请号: US11602207申请日: 2006-11-21
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公开(公告)号: US20070128471A1公开(公告)日: 2007-06-07
- 发明人: Keiji Moroishi , Ang Chor Boon
- 申请人: Keiji Moroishi , Ang Chor Boon
- 专利权人: HOYA CORPORATION HOYA MAGNETICS SINGAPORE PTE. LTD
- 当前专利权人: HOYA CORPORATION HOYA MAGNETICS SINGAPORE PTE. LTD
- 主分类号: G11B5/66
- IPC分类号: G11B5/66 ; C23C14/00
摘要:
In a magnetic disk having at least a glass substrate, a plurality of underlayers formed over the glass substrate, and a magnetic layer formed over the plurality of underlayers, at least one of the underlayers is an amorphous underlayer containing a VIa group element and carbon and, given that the remanent magnetization in a circumferential direction of the disk is Mrc and the remanent magnetization in a radial direction of the disk is Mrr, the magnetic disk has a magnetic anisotropy in which Mrc/Mrr being a ratio between Mrc and Mrr exceeds 1.
公开/授权文献
- US07993497B2 Magnetic disk and magnetic disk manufacturing method 公开/授权日:2011-08-09