S.M. Rossnagel, Michael A. Russak, et al.
Journal of Vacuum Science and Technology A: Vacuum, Surfaces and Films
The dewetting of perfluoropolyether (PFPE) films on amorphous nitrogenated carbon, CNx, is investigated. An optical surface analyzer is used to image perfluoropolyether films on CNx-overcoated magnetic recording disks, An autophobic dewetting transition is observed to result when the PFPE film thickness applied to the disk surface exceeds a critical value. This critical dewetting thickness is linearly dependent on the PFPE molecular weight. Addition of the phosphazine, X-1P, to the PFPE film reduces the critical dewetting thickness compared to that of the neat lubricant. Dewetting in these molecularly-thin PFPE lubricant films is shown to occur at thicknesses where the total disjoining pressure is negative. The impact of this autophobic dewetting on the performance of a head-disk interface is inferred from take-off height measurements conducted as a function of PFPE film thickness. A steep reduction in the slider-disk clearance is observed when the PFPE film is present at thicknesses in excess of the critical dewetting thickness. © 2002 Plenum Publishing Corporation.
S.M. Rossnagel, Michael A. Russak, et al.
Journal of Vacuum Science and Technology A: Vacuum, Surfaces and Films
F.F. Abraham, D. Schneider, et al.
MRS Fall Meeting 1996
T. Ihara, M.C. Shaw, et al.
Journal of Tribology
Jerng-Sik Song, Chin-An Chang
Journal of Vacuum Science and Technology A: Vacuum, Surfaces and Films