Thin film magnetic media for minimal lubricant transfer to head during flying

摘要

A light abrasive texture is applied over the data zone of a thin film magnetic disc, while a surface texture of a second roughness is applied over the landing zone. A lubricant is applied over both the landing zone and the data zone. The lubricant is a high molecular weight PFPE lubricant which has been fractionated by supercritical fluid fractionation in carbon dioxide to exclude the fractions of low molecular weight and to exclude the fractions of very high molecular weight.