发明申请
US20050018347A1 Localized pole tip heating device for magnetic head for hard disk drive
有权
用于硬盘驱动器的磁头的本地极尖加热装置
- 专利标题: Localized pole tip heating device for magnetic head for hard disk drive
- 专利标题(中): 用于硬盘驱动器的磁头的本地极尖加热装置
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申请号: US10624656申请日: 2003-07-21
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公开(公告)号: US20050018347A1公开(公告)日: 2005-01-27
- 发明人: Wen-Chien Hsiao , Quan-Chiu Lam
- 申请人: Wen-Chien Hsiao , Quan-Chiu Lam
- 主分类号: G11B5/00
- IPC分类号: G11B5/00 ; G11B5/012 ; G11B5/10 ; G11B5/17 ; G11B5/31 ; G11B5/39
摘要:
The magnetic head is formed with a narrow pole tip, and a pole tip heating element is fabricated to reduce the pole tip stress and increase its permeability, such that the magnetization switching speed of the pole tip is increased. The heating element is preferably electrically interconnected within the induction coil circuit of the magnetic head, such that the electrical current flowing through the induction coil also flows through the heating element. In a preferred embodiment, the heating element is fabricated above the second magnetic pole. The heating element is preferably formed with a resistance of approximately 0.2 to 1.0 ohms, such that the approximately 40 mA current that flows through the induction coil and the heating element creates a heating energy of the heating element of approximately 0.3 to 1.6 mW. The heating element can be comprised of a variety of materials such as Cu, W, NiFe, NiCr and IrRh.
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