Development of Evaluation Method of Gas Viscous Friction Force Acting on Head/Disk Interface

Koji TANIGUCHI  Masaru NAKAKITA  Yoshihiro UENO  Kaoru MATSUOKA  Koichi SHINOHARA  

Publication
IEICE TRANSACTIONS on Electronics   Vol.E82-C   No.12   pp.2132-2138
Publication Date: 1999/12/25
Online ISSN: 
DOI: 
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Issue on Information Storage Technologies for the 21st Century)
Category: 
Keyword: 
head-disk interface,  gas viscous friction force,  contact friction force,  slider,  disk,  friction force sensor,  

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Summary: 
A method of evaluating the gas viscous friction force acting on head/disk interface has been developed. In the past, the effect of the gas viscous friction force has been almost negligible, due to its small value compared with the contact friction force. Recently the gas viscous friction force has tended to increase with the decrease in spacing and the increase in relative speed between the slider and the disk, therefore it is becoming necessary to consider its effect on motor load or slider posture. Few experimental studies of the gas viscous friction force, however, have been performed. In this study, the measurement of the gas viscous friction force has been realized by developing a sensitive friction force sensor. Furthermore a method of evaluating the gas viscous and contact friction forces separately has been also established.