发明授权
- 专利标题： Disk device and data-erasing method
- 专利标题（中）： 磁盘设备和数据擦除方法
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申请号： US09825649申请日： 2001-04-04
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公开(公告)号： US06900956B2公开(公告)日： 2005-05-31
- 发明人: Hiroki Kitahori , Kenji Kuroki , Hiroshi Matsuda , Satoshi Noguchi , Mutsuro Ohta , Keishi Takahashi , Hitoshi Tamura
- 申请人： Hiroki Kitahori , Kenji Kuroki , Hiroshi Matsuda , Satoshi Noguchi , Mutsuro Ohta , Keishi Takahashi , Hitoshi Tamura
- 申请人地址： NL Amsterdam
- 专利权人： Hitachi Global Storage Technologies Netherlands B.V.
- 当前专利权人： Hitachi Global Storage Technologies Netherlands B.V.
- 当前专利权人地址： NL Amsterdam
- 代理机构： Bracewell & Giuliani LLP
- 优先权： JP2000-126708 20000426
- 主分类号： G11B5/024
- IPC分类号： G11B5/024 ; H01F7/14 ; G11B5/03 ; G11B5/02
摘要：
A magnetic circuit is provided in an enclosure that can efficiently generate magnetic flux from the enclosure, configuring a magnetic disk, to a magnetic disk. Thus, by providing such a magnetic circuit, a magnetic field different from that in other enclosure parts, that is, a local magnetic field, is generated from the magnetic circuit in case the disk device is set in an external magnetic field. Hence, this local magnetic field can effectively erase data in the magnetic disk. In particular, since the local magnetic field is generated even if the external magnetic field is weak, it is possible to not only suppress the demagnetization of permanent magnets used in the spindle motor at minimum, but also effectively erase data in the magnetic disk.
公开/授权文献
- US20020021521A1 Disk device and data-erasing method 公开/授权日：2002-02-21
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