Methodology for the determination of the minimum and gap flying

Details Methodology for the determination of the minimum and gap flying Methodology for the determination of the minimum and gap flying

1996-08-06

1998-01-20

Font, Frank G.

Optics: measuring and testing

By dispersed light spectroscopy

Utilizing a spectrometer

356361, 356359, G01B 902

Patent

active

057106320

ABSTRACT:
A method and apparatus for measuring the flying height of a recording head that is separated from a rotating disk by an air bearing. The recording head has a trailing edge that extends from an interface of a substrate. The trailing edge has an embedded read/write element and an outer tip. The recording head is loaded into a flying height tester that can measure the distance between the disk and any point on the head. The flying height tester contains a transparent disk that is rotated to create an air bearing between the head and the disk. The outer tip is separated from the disk by an air bearing height h.sub.m. The read/write element is separated from the disk by an air bearing height h.sub.g. The substrate interface is separated from the disk by an air bearing height h.sub.i. The flying height tester measures the height h.sub.g to obtain the distance between the read/write element and the disk.

REFERENCES:
patent: 5475488 (1995-12-01), Fukuzawa et al.
patent: 5557399 (1996-09-01), De Groot

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