Invention Grant
- Patent Title: Magnetic head for perpendicular magnetic recording having a return path section
- Patent Title (中): 具有返回路径部分的垂直磁记录用磁头
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Application No.: US13713778Application Date: 2012-12-13
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Publication No.: US08482879B1Publication Date: 2013-07-09
- Inventor: Yoshitaka Sasaki , Hiroyuki Ito , Kazuki Sato , Shigeki Tanemura , Hironori Araki , Tatsuya Shimizu
- Applicant: Yoshitaka Sasaki , Hiroyuki Ito , Kazuki Sato , Shigeki Tanemura , Hironori Araki , Tatsuya Shimizu
- 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: G11B5/127
- IPC: G11B5/127 ; G11B5/17

Abstract:
A magnetic head includes a coil, a main pole, and a return path section. The return path section includes a plurality of magnetic path portions that separate a magnetic flux into a plurality of fluxes and allow the fluxes to pass therethrough in parallel. The coil includes a winding portion disposed around an assemblage of the plurality of magnetic path portions. In any cross section that intersects all of the plurality of magnetic path portions, the distance between two adjacent magnetic path portions is smaller than the minimum width of each of the two adjacent magnetic path portions, and only a nonmagnetic layer is present between the two adjacent magnetic path portions.
Information query
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