MAGNETIC DISK INSPECTION DEVICE AND MAGNETIC DISK INSPECTION METHOD

摘要

PROBLEM TO BE SOLVED: To further improve an accuracy of defect marking position with respect to an actual defect position on a magnetic disk of a magnetic disk inspection device and an inspection method. ! SOLUTION: A magnetic disk inspection device 5 performs: primary inspection of writing and reading test data by spirally scanning an entire surface of a magnetic disk 1 with a first write head 3 and a read head 4b to detect a defect site; and then secondary inspection of concentrically scanning a near-field region including the defect site detected by the primary inspection with the first write head 3 and the read head 4b to again detect a defect site. When both defect sites detected by the primary inspection and the secondary inspection coincide with each other, a magnetic signal is marked on the defect site using a second write head 4a. ! COPYRIGHT: (C)2015,JPO&INPIT