Abstract
Dynamic characteristics of a magnetic head slider of a hard disk drive were analysed using 2 degrees-of-freedom (2-DOF) mechanical model considering the dynamic pressures due to the van der Waals force and the air bearing force. The corrected van der Waals force equation for multilayers and the molecular gas-film lubrication (MGL) equation were used to calculate the pressures. It was found that the statically stable flying of a slider can no longer be achived at the ultrasmall spacing due to the attractive van der Waals force. It was also found that the response of the slider to the disk surface waviness is degraded even if the staic flying is stable. The animations of the slider motion were shown in order to see the influence of the van der Waals force.
