Magnetization patterns of slave media duplicated by using patterned master media

Abstract

It is possible that a servo signal can be written on hard and floppy disks at high speed and low cost by using a magnetic contact duplication technique with patterned master media. The duplicated magnetization patterns of the slave media is elucidated. The duplicated magnetization is not only reversed at transitions, but also changes between transitions for bit lengths more than several μm, while the magnetization is reversed at transitions, and is almost uniform between transitions for bit lengths less than several μm. Therefore, when the above-mentioned duplication technique is applied to hard and floppy disks, it is expected that the magnetization changes only at transitions.