Invention Grant
- Patent Title: Perpendicular magnetic recording head having a non-magnetic film recessed from the air bearing surface for improved high-density magnetic recording
- Patent Title (中): 具有从空气轴承表面凹陷的非磁性膜的垂直磁记录头用于改善高密度磁记录
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Application No.: US12827999Application Date: 2010-06-30
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Publication No.: US08542462B2Publication Date: 2013-09-24
- Inventor: Yohji Maruyama , Tadayuki Iwakura , Tetsuya Okai , Hiromi Shiina , Kazue Kudo
- Applicant: Yohji Maruyama , Tadayuki Iwakura , Tetsuya Okai , Hiromi Shiina , Kazue Kudo
- Applicant Address: NL Amsterdam
- Assignee: HGST Netherlands B.V.
- Current Assignee: HGST Netherlands B.V.
- Current Assignee Address: NL Amsterdam
- Agency: Zilka-Kotab, PC
- Priority: JP2009-159172 20090703
- Main IPC: G11B5/127
- IPC: G11B5/127

Abstract:
According to one embodiment, a perpendicular magnetic recording head includes a main magnetic pole having a trailing side and two lateral sides, a magnetic shield near the trailing side and both lateral sides of the main magnetic pole, the magnetic shield comprising: a first soft magnetic film with a relatively high saturation flux density positioned facing depthwise from a floating surface side thereof, a second soft magnetic film with a relatively low saturation flux density, and a first non-magnetic film. The head also includes a non-magnetic film interposed between the magnetic shield and the main magnetic pole, a first magnetic film magnetically coupled to the magnetic shield and the main magnetic pole on a side opposite a floating surface side thereof, and a coil surrounding a magnetic circuit, the magnetic circuit comprising the main magnetic pole and the first magnetic film. Other systems and methods are also described.
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