METHOD OF MEASURING OPTIMAL SEEK TIME BY CONSIDERING MAGNETIC HEAD SETTLING TIME, AND INSPECTION DEVICE USING THIS MEASURING METHOD

摘要

PROBLEM TO BE SOLVED: To provide an optimal seek time-measuring method which can measure and set up the optimal seek and improve the inspection throughput when inspecting a magnetic disk or a magnetic head, and to provide an inspection device using this measuring method.;SOLUTION: This invention obtains differences between the positive-side average and the negative-side average of read signals for each sector throughout one track, writes the test data by calculating the seek time by changing the settling time using the maximum H and the minimum L of the differences, reads the test data and calculates the average variation DEV=(H-L)/(H+L), and obtains the minimum settling time out of the settling time whose average change DEV becomes equal to or smaller than a predetermined value, as the optimal settling time or the optimal seek time.;COPYRIGHT: (C)2011,JPO&INPIT