Experimental Study on Mechanical Characteristics of Liquid Meniscus Bridge

(Effects of Solid Surface Roughness)

Abstract

In recent years, the recording density of hard disk drive (HDD) is increasing remarkably by the development of machine technologies, and the gap between the magnetic disk and the magnetic flying head slider is less than 5 nm. Therefore, the effects of the surface force such as the van der Waals force and the meniscus force have to be taken into account for the design of HDDs. In this study, the mechanical characteristics of liq uid meniscus bridge were experimentally investigated using the meniscus response apparatus. The contact angle of n-tetradecane to the glass surface was controlled by coating the glass surface with oil repellent film. Especially, the effects of solid surface roughness on the dynamic characteristics were clarified.