S1603-1-2 Effect of Ultraviolet Irradiation on Adhesive Force and Elongation of Monolayer Lubricant Films Coated on Magnetic Disk Surface

Abstract

We measured the effect of ultraviolet (UV) inadiation to perfluoiopolyether monolayer lubricant films on the adhesive forte and the vertical elongation of the lubricant bridge formed between the lubricant films on magnetic disk surflices and a diamond tip. Two types of PFPE lubricants Fomblin AM3001 having polar functional end groups and higher UV ab9rptance, and Fomblin Z03 having non-polar functional end groups and less UV absorptance, and a chemically patterned Z03 lubricant film were sdected. It was found that Z03 was more susceptible to UV inadiation than AM3001 in terms of the adhesive force and the elongation of the lubricant bridge. It was also revealed that the local bonding ratio of the chemically patterned lubricant film mainly contributed to the adhesive force and the vertical elongation.