Invention Grant
- Patent Title: Thin film magnetic head and magnetic disk device
- Patent Title (中): 薄膜磁头和磁盘装置
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Application No.: US12318924Application Date: 2009-01-13
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Publication No.: US08009392B2Publication Date: 2011-08-30
- Inventor: Takayasu Kanaya , Kei Hirata , Yohei Koyanagi , Seiichi Takayama , Shinji Hara , Toshiyuki Ayukawa
- Applicant: Takayasu Kanaya , Kei Hirata , Yohei Koyanagi , Seiichi Takayama , Shinji Hara , Toshiyuki Ayukawa
- Applicant Address: JP Tokyo
- Assignee: TDK Corporation
- Current Assignee: TDK Corporation
- Current Assignee Address: JP Tokyo
- Agency: Posz Law Group, PLC
- Main IPC: G11B5/33
- IPC: G11B5/33 ; G11B5/48 ; G11B5/60
Abstract:
Foundation layers of a thin film magnetic head are disposed between insulating layers and bias magnetic field application layers, and are configured of Cr or Cr alloy. The insulating layers are configured of a Si oxide such that the Si content of the Si oxide is in the range of 30˜56 at % (atom %) and that the atom ratio of oxygen to Si (O/Si) is in the range of 0.8˜1.3. With the configuration, the occurrence rate of noise is reduced.
Public/Granted literature
- US20100177440A1 Thin film magnetic head and magnetic disk device Public/Granted day:2010-07-15
Information query
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