Abstract
The effect of temperature on the spreading characteristics of ultra-thin liquid lubricant films has become more and more important in current hard disk drives. In this study, the spreading of molecularly thin Perfluoropolyether (PFPE) lubricant films on the carbon surfaces was investigated experimentally, varying the temperature of the micro-ellipsometer test stage. Three types of the lubricants ware used. The apparent diffusion coefficients of the test lubricants were also evaluated and compared with the trend of the bulk lubricant viscosity change for temperature. As a result, the temperature dependence of the spreading characteristics of lubricant films was clarified and it was found that A20H lubricant has the highest robustness for the temperature change among the test lubricants.
