发明名称 |
Reverse magnetic reset to screen for weakly pinned heads |
摘要 |
A method is disclosed for testing pinned layers of magnetic disk drive read heads having at least one pinned layer, where the magnetic orientation of the pinned layers has been set in an initial direction. The method includes applying a large magnetic test field at a reverse canted reset angle. First test responses from the disk drive read heads are then measured in a small magnetic test field. A large magnetic test field is applied at normal canted reset angle. The disk drive heads are then subjected to a full suite of performance tests in a small magnetic test field to verify their acceptability. These second test responses are then compared to the first test responses to identify read heads having weakly pinned layers.
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申请公布号 |
US2006066299(A1) |
申请公布日期 |
2006.03.30 |
申请号 |
US20040955301 |
申请日期 |
2004.09.30 |
申请人 |
FOX CIARAN A;MACKAY KENNETH D;NIKITIN VLADIMIR |
发明人 |
FOX CIARAN A.;MACKAY KENNETH D.;NIKITIN VLADIMIR |
分类号 |
G01R33/12 |
主分类号 |
G01R33/12 |
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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