Invention Grant
- Patent Title: Perpendicular magnetic recording head and manufacturing method thereof
- Patent Title (中): 垂直磁记录头及其制造方法
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Application No.: US12037369Application Date: 2008-02-26
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Publication No.: US08125733B2Publication Date: 2012-02-28
- Inventor: Hisayuki Yazawa , Kiyoshi Kobayashi
- Applicant: Hisayuki Yazawa , Kiyoshi Kobayashi
- Applicant Address: JP Tokyo
- Assignee: TDK Corporation
- Current Assignee: TDK Corporation
- Current Assignee Address: JP Tokyo
- Agency: Brinks Hofer Gilson & Lione
- Priority: JP2007-059476 20070309
- Main IPC: G11B21/21
- IPC: G11B21/21

Abstract:
A perpendicular magnetic recording head includes a main magnetic pole layer; and a return yoke layer laminated on the main magnetic pole layer with a magnetic gap layer formed of a nonmagnetic material disposed on an opposing surface opposite a recording medium. The return yoke layer includes a first throat part opposing the main magnetic pole layer at a side close to the recording medium-opposing surface with a first gap spacing corresponding to a film thickness of the magnetic gap layer; and a second throat part extending to a deeper side than the first throat part in a height direction and opposing the main magnetic pole layer with a second gap spacing greater than the first gap spacing. A throat height determining layer is provided on the main magnetic pole layer or the magnetic gap layer, the throat height determining layer defining a dimension of the first throat part of the return yoke layer in the height direction and formed of an inorganic nonmagnetic material.
Public/Granted literature
- US20080218908A1 PERPENDICULAR MAGNETIC RECORDING HEAD AND MANUFACTURING METHOD THEREOF Public/Granted day:2008-09-11
Information query
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