Invention Grant
US07768744B2 Perpendicular magnetic recording write head with coplanar main pole and return poles and magnetic recording system 有权
垂直磁记录头与共平面的主极和返回极和磁记录系统

Perpendicular magnetic recording write head with coplanar main pole and return poles and magnetic recording system
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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