Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : March 14, 2018 - March 15, 2018
This paper describes various important findings of surface force between head and disk calculated from adhesion asperity contact theory. The theoretical formulation of surface pressure and surface force applied to thermal-flying-height-control slider is first explained briefly. From calculated results, it was found that adhesive surface force becomes insensitive to the change of lubricant thickness at a bond ratio of 0.85 and that the maximum adhesion force becomes minimum at 0.6 nm lubricant thickness. This suggests the next target of lubricant thickness for higher density magnetic disk. The surface energy versus lubricant thickness obtained from the surface pressure equation shows good compatibility with experimental results. It is also found that static instability of pico-slider due to vdW adhesion force and dynamic instability due to meniscus force can be consistently understood from this surface force theory.
