Abstract
It is possible for servo signals to be written on hard and floppy disks at high speed and low cost by using a magnetic contact duplication technique with lithographically patterned master media. The duplicated magnetization patterns of the slave media are elucidated. In this duplication technique, a dc magnetic field is applied at the time of duplication. When the degree of duplication is nearly maximum at the optimum magnetic field, the duplicated magnetization is reversed at transitions and the magnitude of the magnetization is close to saturation level. Therefore, when this technique is applied to hard and floppy disks, it is expected that a high signal-to-noise ratio can be attained.
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