发明名称 |
TAMR structure with HDI sensor for head-disk interference and temperature rise sensing |
摘要 |
A DFH (dynamic fly height) equipped TAMR (Thermal Assisted Magnetic Recording) write head uses optical-laser excited surface plasmons to locally heat a magnetic recording medium so that writing is enabled, while a DFH heater allows the head to fly very close to the magnetic medium. The write head includes an integral HDI sensor with a narrow track width for high spatial resolution. The HDI sensor is calibrated to obtain a relationship between its resistance and heater power. When the TAMR head is operated, measurement of high frequency voltage across the HDI sensor as a function of heater power indicates impending touchdowns, while use of the calibrated resistance curve enables the sensor to monitor temperature variations within components of the TAMR write head. |
申请公布号 |
US8654618(B1) |
申请公布日期 |
2014.02.18 |
申请号 |
US201213617487 |
申请日期 |
2012.09.14 |
申请人 |
LIU KOWANG;JIN XUHUI;LOU XIAOHUA;HEADWAY TECHNOLOGIES, INC. |
发明人 |
LIU KOWANG;JIN XUHUI;LOU XIAOHUA |
分类号 |
G11B11/00 |
主分类号 |
G11B11/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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