Abstract
This paper describes the interactions between flying head sliders and ultra-thin liquid lubricant films in hard disk drives. In this study, two types of lubricants (A20H2000 & C2-2000) were tested and the surface energy of the test lubricants was investigated. In addition, the dynamics of the slider touchdown and takeoff hysteresis behavior was also evaluated by using Laser Doppler Vibrometer (LDV) and Acoustic Emission (AE) sensor. As a result, it was found that touchdown velocities of A20H2000 was smaller than that of C2-2000 and the takeoff velocities of A20H2000 and C2-2000 were almost same. Therefore, it was suggeseted that the slider hysteresis behavior may not be dependent on the surface energy of the ultra-thin lubricant films.
