Invention Grant
- Patent Title: Thin film magnetic head, magnetic head device and magnetic recording/reproducing device
- Patent Title (中): 薄膜磁头，磁头装置和磁记录/再现装置
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Application No.: US10667337Application Date: 2003-09-23
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Publication No.: US06965496B2Publication Date: 2005-11-15
- Inventor: Noboru Yamanaka
- Applicant: Noboru Yamanaka
- Applicant Address: JP Tokyo
- Assignee: TDK Corporation
- Current Assignee: TDK Corporation
- Current Assignee Address: JP Tokyo
- Agency: Oliff & Berridge, PLC
- Priority: JP2002-288743 20021001
- Main IPC: G11B5/31
- IPC: G11B5/31 ; G11B5/39 ; G11B5/147
Abstract:
In a first magnetic film, two notches are formed separately by a given distance, and a first pole piece is located between the notches. The first pole piece includes a uniform width portion. A second magnetic film includes a second pole piece. In the first pole piece, if the height of the uniform width portion is defined by “TH1”, and the depth of the uniform width portion to a top surface from a base plane of the first magnetic film is defined by “ND1”, and the thickness of said gap film is defined by “WG”, the relations of TH1≧4WG and ND1≧4WG are satisfied.
Public/Granted literature
- US20040066578A1 Thin film magnetic head, magnetic head device and magnetic recording/reproducing device Public/Granted day:2004-04-08
Information query
IPC分类:
