Patent ID: 6548140
Filing Date: 2003-04-15
Classification: G11B,Y10T

Abstract:
A thin film magnetic disc for a computer disc drive, the computer disc drive having an air bearing read/write head mounted on an actuator arm adjacent a surface of the thin film magnetic disc, the thin film magnetic disc comprising:landing zone on the thin film magnetic disc, the landing zone having a first roughness; a data zone on the thin film magnetic disc and located outward from the landing zone, the data zone being adapted to magnetically record information via the air bearing read/write head, the data zone having a second surface roughness which is less than the first surface roughness of the landing zone; and a lubricant over both the landing zone and the data zone, the lubricant having been fractionated to exclude fractions of high molecular weight relative to molecular weights of the lubricant prior to fractionation.