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Erschienen in: Tribology Letters 3/2012

01.09.2012 | Original Paper

Air Entrapment in Nanometer-Thick Lubricant Films and its Effect on Slider Flying Height in a Hard Disk Drive

verfasst von: B. Marchon, X. C. Guo, S. Canchi, R. H. Wang, N. Supper, J. Burns, S. Deoras, J. Zhang, A. Yang, N. Bach, Y. Saito

Erschienen in: Tribology Letters | Ausgabe 3/2012

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Abstract

Experimental data are presented, showing that the flying height of a slider in a hard disk drive can be altered by the chemical nature of the molecularly-thin lubricant film on the disk surface. It is suggested that this effect is likely due to entrapment of the air molecules, both nitrogen and oxygen, within the lubricant film, which results in pressurization loss within the air bearing gap, and lower slider flying height. For the two advanced multidentate lubricants reported in this study, the amount of flying height change is almost insignificant for one of them, but amount to about 0.7 nm, i.e. a significant fraction of the magnetic spacing budget for the other. Bulk air solubility data suggest that the magnitude of this effect is diminished for lubricant molecules with a lower density of backbone ether linkages.

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Metadaten
Titel
Air Entrapment in Nanometer-Thick Lubricant Films and its Effect on Slider Flying Height in a Hard Disk Drive
verfasst von
B. Marchon
X. C. Guo
S. Canchi
R. H. Wang
N. Supper
J. Burns
S. Deoras
J. Zhang
A. Yang
N. Bach
Y. Saito
Publikationsdatum
01.09.2012
Verlag
Springer US
Erschienen in
Tribology Letters / Ausgabe 3/2012
Print ISSN: 1023-8883
Elektronische ISSN: 1573-2711
DOI
https://doi.org/10.1007/s11249-012-9992-x

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