METHOD OF MAKING MASTER MOLD FOR IMPRINTING MAGNETIC DISK

摘要

PROBLEM TO BE SOLVED: To provide a method using block copolymers for making a master mold for nanoimprinting a patterned magnetic recording disk with patterned servo sectors.SOLUTION: A patterned-media perpendicular magnetic recording disk 10 is nanoimprinted from a master mold made using directed self-assembly of block copolymers. The disk has patterned concentric circular data tracks of individual data islands 30, and has patterned servo sectors 120 extending generally radially across the patterned data tracks. The servo pattern is a chevron pattern of slanted or non-radial stripes that have a stripe pitch in the cross-stripe direction substantially equal to a track pitch.