Patent ID: 6081411
Filing Date: 2000-06-27
Classification: G11B

Abstract:
A method of manufacturing disk drives including thin film disks comprising the steps of:subjecting a disk substrate to a cleaning process which causes arcuate micro-scratches in first and second planar surfaces of the substrates, the arcuate micro-scratches on the first and second planar surfaces predominantly arcing in a common direction of curvature with respect to a radius of the substrate;depositing at least one thin film on first and second planar surfaces, including a magnetic film, to form a magnetic disk;determining the common direction of curvature of the arcuate micro-scratches on first and second planar surfaces of the magnetic disk;mounting the substrate on a spindle which will rotate the disk in a first direction when installed in the disk drive; andmerging the disk with an actuator assembly which has first and second read heads for the first and second planar surface respectively, the actuator assembly being pivotally mounted to move the first and second read heads in an arcuate direction across the planar surfaces which is substantially different from the common direction of curvature of the micro-scratches.