发明名称 |
Measurement of slider clearance by inducing collision of the slider with disk surface |
摘要 |
A method for measuring the clearance of a slider over a rotating disk by inducing a collision between the slider and the disk is described. After the normal flying height of the slider is established, the slider is driven into a collision with the rotating disk surface by applying a DC or AC voltage between the slider and the disk. The clearance data can be extracted from the induced collision by measuring a parameter, such as the change in the amplitude of the readback signal from the magnetic sensor, which is related to fly-height at the normal fly-height and at the disk surface. The two data points can then be used to derive the clearance. One embodiment uses a single beam interferometer to derive the vibrational displacement of the collision event.
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申请公布号 |
US2006002001(A1) |
申请公布日期 |
2006.01.05 |
申请号 |
US20040882882 |
申请日期 |
2004.06.30 |
申请人 |
FONG WALTON;GILLIS DONALD R;KNIGGE BERNHARD E;PIT REMMELT;SUK MIKE |
发明人 |
FONG WALTON;GILLIS DONALD R.;KNIGGE BERNHARD E.;PIT REMMELT;SUK MIKE |
分类号 |
G11B21/02;G11B27/36 |
主分类号 |
G11B21/02 |
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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