Title :
Fomblin Multidentate Lubricants for Ultra-Low Magnetic Spacing
Author :
Marchon, B. ; Guo, X.C. ; Karis, T. ; Deng, H. ; Dai, Q. ; Burns, J. ; Waltman, Robert
Author_Institution :
Hitachi GST, San Jose Res. Center, CA
Abstract :
This paper discusses a new class of lubricants for disk application, designed for ultra-low magnetic spacing. By tying down the middle of the long perfluoropolyether (PFPE) Fomblin chain to the overcoat surface with additional functional groups, one can achieve the very low clearance needed for the future, sub-5 nm flying height head-disk interface. Bulk synthesis and characterization are described, and tribological performance is investigated. Benefits of this novel lubricant family can be attributed not only to its shorter free chain length, but also to disjoining pressure attributes
Keywords :
hard discs; lubricants; magnetic heads; Fomblin multidentate lubricants; flying height head-disk interface; perfluoropolyether Fomblin chain; tribological performance; ultra-low magnetic spacing; Atmosphere; Fractionation; Humidity measurement; Lubricants; Magnetic analysis; Magnetic liquids; Nitrogen; Nuclear magnetic resonance; Temperature; Tribology; Head-disk interface; lubricant; tribology;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2006.878628
