S1604-1-2 液体超薄膜の加熱による変形流動特性(ヘッド・ディスク・インターフェイス,社会変革を技術で廻す機械工学)

概要

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In the head-disk interface (HDI) of a hard disk drive (HDD), lubricant deformation affects flying characteristics of the head slider, as the flying height decreases. Therefore, it is very important to investigate the deformation and flow characteristics of lubricant on a recording disk. In particular, in heat-assisted magnetic recording (HAMR), laser heating of the lubricant induces tempeature distribution, which may cause deformation of the lubricant film. In this paper, thickness distributions of locally heated perfluoropolyether (PFPE) films were measured experimentally and were calculated numerically by using unsteady and linearized long-wave equation considering the temperature and the film thickness dependence of the surface tension. The film deformation characteristics due to the temperature distribution were discussed and the experimental and theoretical results were compared.
2010-09-04