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A technique for evaluating track deviation at nanometer-scale accuracy

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4 Author(s)
K. Yasuna ; Mech. Eng. Res. Lab., Hitachi Ltd., Tsuchiura, Japan ; T. Yamaguchi ; K. Shishida ; T. Hamaguchi

A technique for evaluating track deviation in magnetic disk drives has been developed. The technique uses an external position sensor and an error cancellation sequence, and enables measurement of track-to-track spacing. The resolution of track position is less than 2 nm. The repeatability is less than 5 nm. The technique helps reveal track alignment error, which needs to be reduced to achieve over-100-KTPI recording

Published in:

IEEE Transactions on Magnetics  (Volume:37 ,  Issue: 4 )