Thermal Flying-Height Control Sliders in Air-Helium Gas Mixtures

Filling hard disk drives with air-helium gas mixtures instead of pure helium can balance performance improvement, such as reduced power cost, increased capacity and improved reliability, against manufacturing cost increase. A consistent approach is proposed here to investigate the flying performance...

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Bibliographic Details
Published in:IEEE transactions on magnetics 2011-01, Vol.47 (1), p.100-104
Main Authors: Liu, Nan, Zheng, Jinglin, Bogy, David B.
Format: Article
Language:English
Subjects:
Conductivity
Cost engineering
Cross-disciplinary physics: materials science
rheology
Disk drives
Equations
Exact sciences and technology
Flight
Flyability
Flying
Gas mixtures
head-disk interface (HDI)
Heating
Helium
Magnetism
Manufacturing costs
Materials science
Other topics in materials science
Physics
Sliders
Thermal conductivity
thermal flying-height control (TFC)
Transducers
Viscosity
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Description
Summary:Filling hard disk drives with air-helium gas mixtures instead of pure helium can balance performance improvement, such as reduced power cost, increased capacity and improved reliability, against manufacturing cost increase. A consistent approach is proposed here to investigate the flying performance of thermal flying height control sliders flying in air-helium gas mixtures. It is found that the smallest power required for a designated flying height appears when the gas mixture is composed of about half helium and half air. The proposed numerical approach can also find application in investigating a slider's flying performance in a humid environment.
ISSN:0018-9464
1941-0069
DOI:10.1109/TMAG.2010.2080313