Drive-level flying height measurements and altitude effects

Author

Deng, Youping ; Tsai, Hsiao-chu ; Nixon, Brian J.

Author_Institution

Quantum Corp., Milpitas, CA, USA

Volume

30

Issue

6

fYear

1994

fDate

11/1/1994 12:00:00 AM

Firstpage

4191

Lastpage

4193

Abstract

An electrical method was developed to measure the flying height in a sealed drive. In this method, component-level measurements were first performed on a PPL interferometer and a Guzik tester. Good correlation was found between the flying height and the pulse width (PW50). Within the range of interest, the PW50 was a linear function of the flying height. Thus, the flying height in the drive was obtained by measuring the PW50. This method was used to study the variation in the flying height due to the reduction in air pressure. Changes in recording properties such as signal amplitude, SNR and O/W with the altitude change were also studied

Keywords

height measurement; magnetic heads; Guzik tester; PPL interferometer; PW50; SNR; air pressure; altitude effects; component-level measurements; drive-level measurements; electrical method; flying height; overwrite; pulse width; recording properties; sealed drive; signal amplitude; Electric variables measurement; Level measurement; Magnetic heads; Optical recording; Performance evaluation; Pressure measurement; Pulse measurements; Space vector pulse width modulation; Testing; Velocity measurement;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.334032

Filename

334032