Invention Grant
- Patent Title: Laminated high moment magnetic films antiferromagnetic coupling as write pole of perpendicular magnetic recording head
- Patent Title (中): 层叠高力矩磁性膜反铁磁耦合作为垂直磁记录头的写极
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Application No.: US10927875Application Date: 2004-08-27
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Publication No.: US07656611B2Publication Date: 2010-02-02
- Inventor: Yinshi Liu , Nian-Xiang Sun , Yunxiao Gao , Yimin Hsu , Tomohiro Okada , Yasuyuki Okada
- Applicant: Yinshi Liu , Nian-Xiang Sun , Yunxiao Gao , Yimin Hsu , Tomohiro Okada , Yasuyuki Okada
- Applicant Address: NL Amsterdam
- Assignee: Hitachi Global Storage Technologies Netherlands B.V,
- Current Assignee: Hitachi Global Storage Technologies Netherlands B.V,
- Current Assignee Address: NL Amsterdam
- Agency: IPxLaw Group LLP
- Agent Maryam Imam
- Main IPC: G11B5/147
- IPC: G11B5/147 ; G11B5/31

Abstract:
A perpendicular write head includes a main pole comprising high moment magnetic layers laminated with both soft magnetic layers and non-magnetic layers for antiferromagnetic coupling (AFC) between the high moment material layers. The perpendicular write head includes a return pole connected to the main pole by a back gap closure at a distal end and separated from the main pole by a gap at an air bearing surface (ABS). A write coil is positioned between the main pole and the return pole and the surface area of the return pole at the ABS is substantially larger than the surface area of the main pole at the ABS.
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