Iteration method to improve the fly height measurement...

Details Iteration method to improve the fly height measurement... Iteration method to improve the fly height measurement...

2006-12-22

2010-10-19

Toatley, Jr., Gregory J (Department: 2877)

Optics: measuring and testing

By light interference

For dimensional measurement

Reexamination Certificate

active

07817286

ABSTRACT:
In one embodiment and method of the present invention, an optical interference fly height (FH) test apparatus for measuring FH is disclosed, in accordance with an embodiment of the present invention, to include a slider, a transparent disk, means for directing a light beam directed between the slider and the disk, and means for iteratively measuring an estimated FH using at least two points of measurement on the slider when the slider is moved away from the disk at a pitch angle, wherein the estimated FH is computed as a function of the pitch angle and during each iteration, a previously-estimated FH is used to converge the estimated FH so that the estimated FH is within a predetermined range from the actual FH.

REFERENCES:
patent: 4630926 (1986-12-01), Tanaka et al.
patent: 5502565 (1996-03-01), Fukuzawa et al.
patent: 5673110 (1997-09-01), Erickson et al.
patent: 5680213 (1997-10-01), Hunsaker et al.
patent: 5710632 (1998-01-01), Li
patent: 5767964 (1998-06-01), Wahl et al.
patent: 5880840 (1999-03-01), Li
patent: 5953125 (1999-09-01), de Groot
patent: 6477013 (2002-11-01), Kang et al.
patent: 6590667 (2003-07-01), Lee et al.
patent: 6624892 (2003-09-01), Johnson
patent: 6688743 (2004-02-01), Durnin et al.
patent: 6710881 (2004-03-01), Ngoi et al.
patent: 6847459 (2005-01-01), Zhu et al.
Zhu et al., “Measurement of Head/Disk Spacing with a Laser Interferometer,” Nov. 1988, IEEE Transactions on Magnetics, vol. 24, No. 6, pp. 2739-2741.

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