发明授权
- 专利标题: Magnetic head and magnetic disk apparatus
- 专利标题(中): 磁头和磁盘设备
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申请号: US12315523申请日: 2008-12-03
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公开(公告)号: US08717708B2公开(公告)日: 2014-05-06
- 发明人: Mao Nishiyama , Shuji Nishida , Hideaki Maeda , Masafumi Mochizuki
- 申请人: Mao Nishiyama , Shuji Nishida , Hideaki Maeda , Masafumi Mochizuki
- 申请人地址: NL Amsterdam
- 专利权人: HGST Netherlands B.V.
- 当前专利权人: HGST Netherlands B.V.
- 当前专利权人地址: NL Amsterdam
- 代理机构: Brokaw Patent Law PC
- 代理商 Christopher J. Brokaw
- 优先权: JP2007-332747 20071225
- 主分类号: G11B5/127
- IPC分类号: G11B5/127
摘要:
Embodiments of the present invention provide a magnetic head for perpendicular magnetic recording, and a magnetic disk apparatus capable of preventing data erasure caused by alignment marks. In an embodiment, the magnetic head includes a head element including at least a main pole having a pole face on a flying surface and an auxiliary pole; alignment marks made of a magnetic material and used to detect the amount of lapping work when lapping the pole face of the main pole; and members made of a magnetic material, continuously extending in either direction with respect to the position of the main pole from within the alignment marks outward at least beyond the alignment marks.
公开/授权文献
- US20090161263A1 Magnetic head and magnetic disk apparatus 公开/授权日:2009-06-25