Measurement of slider clearance by inducing collision of the...

Dynamic magnetic information storage or retrieval – Automatic control of a recorder mechanism – Controlling the head

Reexamination Certificate

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Reexamination Certificate

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07119979

ABSTRACT:
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.

REFERENCES:
patent: 5567864 (1996-10-01), Coon et al.
patent: 5673110 (1997-09-01), Erickson et al.
patent: 6417981 (2002-07-01), Smith
patent: 6590667 (2003-07-01), Lee et al.
patent: 2001/0035960 (2001-11-01), Johnston
patent: 2002/0001151 (2002-01-01), Lake
patent: 2002/0071196 (2002-06-01), Chapin et al.
patent: 2002/0097517 (2002-07-01), Bonin et al.
patent: 2002/0176185 (2002-11-01), Fayeulle et al.
patent: 2003/0007279 (2003-01-01), Johnson et al.
patent: 2003/0058559 (2003-03-01), Brand et al.
patent: 2003/0067698 (2003-04-01), Dakroub et al.
patent: 2005/0105203 (2005-05-01), Zhu et al.
J. Xu and R. Tsuchiyama, “Ultra-low-flying-height design from the viewpoint of contact vibration”, Tribiology International 36 (2003), pp. 459-466.

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