Invention Grant
- Patent Title: Magnetic head for perpendicular magnetic recording having a main pole, a shield and a coil core part setback away from the medium facing surface a specified distance
- Patent Title (中): 用于垂直磁记录的磁头,其具有主极,屏蔽和线圈芯部分,从介质面向表面远离指定距离
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Application No.: US13208980Application Date: 2011-08-12
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Publication No.: US08441755B2Publication Date: 2013-05-14
- Inventor: Yoshitaka Sasaki , Hiroyuki Ito , Kazuki Sato , Atsushi Iijima
- Applicant: Yoshitaka Sasaki , Hiroyuki Ito , Kazuki Sato , Atsushi Iijima
- Applicant Address: US CA Milpitas CN Hong Kong
- Assignee: Headway Technologies, Inc.,Sae Magnetics (H.K.) Ltd.
- Current Assignee: Headway Technologies, Inc.,Sae Magnetics (H.K.) Ltd.
- Current Assignee Address: US CA Milpitas CN Hong Kong
- Agency: Oliff & Berridge, PLC
- Main IPC: G11B5/17
- IPC: G11B5/17

Abstract:
A magnetic head includes: a main pole; a coil; a first shield having an end face that is located in a medium facing surface at a position forward of an end face of the main pole along a direction of travel of a recording medium; and a first return path section disposed forward of the main pole along the direction of travel of the recording medium. The first return path section connects part of the main pole away from the medium facing surface to the first shield so that a first space is defined. The coil includes a first portion having a planar spiral shape and wound around a core part of the first return path section. The first portion includes first and second coil elements that each extend through the first space. No part of the coil other than the first and second coil elements exists in the first space.
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