Abstract
Vibration characteristics of a head slider in hard disk drives in near-contact and contact regimes becomes important because head-disk spacing must be decreased to less than 1 nm in order to increase recording density. This study elucidates head-disk interfacial (HDI) force based on rough surface adhesion contact models. Total HDI force including air-bearing force and suspension load due to spacing variation and resonance frequency of head slider at a given equilibrium spacing are evaluated for five different adhesion contact models. It was found that the experimental vibration characteristics can be explained well by asperity meniscus contact model. Two stable contact sliding conditions for contact recording are discussed. The stable sliding condition at a large separation is recommended from aspect of reducing head wear.
