DISK MATERIAL POLISHING METHOD, DISK MATERIAL POLISHING DEVICE, DISK MATERIAL, SUBSTRATE FOR MAGNETIC DISK, AND MAGNETIC DISK

摘要

PROBLEM TO BE SOLVED: To accurately polish a disk, particularly the inner peripheral end surface thereof, using a single polishing member. SOLUTION: When the disk material is polished, a polishing brush having brush bristles whose front ends are flat is used. While a polishing fluid is supplied, the polishing brush having the brush bristles whose front ends are flat is moved relative to the disk material and brought into contact therewith to polish the inner peripheral end surface of the disk material. COPYRIGHT: (C)2010,JPO&INPIT