Invention Grant
- Patent Title: Perpendicular magnetic recording write head with coplanar main pole and return poles and magnetic recording system
- Patent Title (中): 垂直磁记录头与共平面的主极和返回极和磁记录系统
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Application No.: US11743150Application Date: 2007-05-02
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Publication No.: US07768744B2Publication Date: 2010-08-03
- Inventor: Wen-Chien David Hsiao , Yimin Hsu , Edward Hin Pong Lee , Vladimir Nikitin
- Applicant: Wen-Chien David Hsiao , Yimin Hsu , Edward Hin Pong Lee , Vladimir Nikitin
- 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
- Agent Thomas R. Berthold
- Main IPC: G11B5/147
- IPC: G11B5/147 ; G11B5/17

Abstract:
A perpendicular magnetic recording write head has a main pole and return poles that are substantially coplanar. The write head includes a main pole, two return poles and a connecting stud that are all formed as a single layer in a single deposition and patterning step. The coplanar main and return poles lie in a plane parallel to the cross-track direction. The two return poles are thus spaced from the main pole in the cross-track direction. The main pole includes a write pole connected to it but lying in a plane spaced in the along-the-track direction from the plane of the main pole. The write head includes a helical coil wrapped around the main pole. The magnetic flux path is from the write pole to the disk recording layer in a data track aligned with the write pole, to the disk underlayer beneath the recording layer, through the underlayer to data tracks spaced cross-track from the data track aligned with the write pole, and back through the return poles.
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