Patent ID: 9093122
Filing Date: 2015-07-28
Classification: G11B

Abstract:
1. A method for improving measurements involving aggressor tracks, the method comprising: (a) erasing a circumferential band of a disk; (b) writing a central track on the circumferential band of the disk; (c) measuring and storing a first track profile of the central track; (d) writing an aggressor track on each side of the central track at a preselected aggressor track offset from the central track; (e) measuring and storing a track profile of the aggressor tracks at the preselected aggressor track offset from the central track; (f) measuring and storing a second track profile of the central track; performing (a) through (f) exactly n times where n is greater than or equal to 1; determining an estimated distance between the aggressor tracks based on the respective track profiles; and determining a selected measurement using the estimated distance between the aggressor tracks, and the first and second track profiles of the central track.