Invention Grant
- Patent Title: Perpendicular magnetic write head having a laminated trailing return pole
- Patent Title (中): 垂直写磁头具有层叠的后退磁极
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Application No.: US12975121Application Date: 2010-12-21
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Publication No.: US08929028B2Publication Date: 2015-01-06
- Inventor: Wen-Chien D. Hsiao , Yimin Hsu , Jennifer Leung
- Applicant: Wen-Chien D. Hsiao , Yimin Hsu , Jennifer Leung
- Applicant Address: NL Amsterdam
- Assignee: HGST Netherlands B.V.
- Current Assignee: HGST Netherlands B.V.
- Current Assignee Address: NL Amsterdam
- Agency: Zilka-Kotab, PC
- Main IPC: G11B5/147
- IPC: G11B5/147 ; G11B5/127 ; G11B5/31

Abstract:
A perpendicular magnetic write head having a laminated trailing return pole structure that reduces magnetic eddy currents in the return pole for improved write head efficiency. The trailing magnetic return pole includes multiple magnetic layers. Each magnetic layer is separated from an adjacent magnetic layer of the return pole by a non-magnetic layer. The non-magnetic layer terminates at a region that is removed from the air bearing surface in order to allow contact between the magnetic layers at the ABS, thereby preventing stray magnetic fields from emitting from the magnetic layers of the write pole.
Public/Granted literature
- US20120154954A1 PERPENDICULAR MAGNETIC WRITE HEAD HAVING A LAMINATED TRAILING RETURN POLE Public/Granted day:2012-06-21
Information query
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