发明名称 |
READ SENSOR HAVING A STRUCTURE FOR REDUCING MAGNETIC COUPLING BETWEEN A MAGNETIC BIAS LAYER AND AN UPPER MAGNETIC SHIELD |
摘要 |
A magnetic sensor having reduced read gap thickness, reduced signal noise and improved signal to noise ratio. The sensor includes a sensor stack and hard bias structures formed at either side of the sensor stack for biasing the free layer of the sensor. A protective layer is formed over a portion of the hard bias structure, however a portion of the hard bias structure extends upward toward the upper shield and is disposed between the protective layer and the sensor stack as a result of the process used to form the magnetic bias structure. This portion of the hard bias structure that extends toward the upper shield has a reduced magnetization relative to the rest of the hard bias structure so that it will not magnetically couple with the upper shield.
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申请公布号 |
US2013308228(A1) |
申请公布日期 |
2013.11.21 |
申请号 |
US201213472326 |
申请日期 |
2012.05.15 |
申请人 |
MASHIMA HIDEKI;YOSHIDA NOBUO;IBUSUKI TAKAHIRO;YASUDA TSUTOMU;HITACHI GLOBAL STORAGE TECHNOLOGIES NETHERLANDS B.V. |
发明人 |
MASHIMA HIDEKI;YOSHIDA NOBUO;IBUSUKI TAKAHIRO;YASUDA TSUTOMU |
分类号 |
G11B5/39;B23P17/00 |
主分类号 |
G11B5/39 |
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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