METHOD FOR MANUFACTURING SUBSTRATE FOR MAGNETIC DISK

摘要

PROBLEM TO BE SOLVED: To reduce quality variation of an outer peripheral end part and an inner peripheral end part of a substrate for a magnetic disk between processing batches.

SOLUTION: The method for manufacturing the substrate for the magnetic disk includes an end surface polishing process for performing mirror surface polishing by a brush polishing method to an outer peripheral end surface and/or an inner peripheral end surface of an annular glass substrate. In the end surface polishing process, the weight of a polishing agent included in a slurry is controlled so that the specific gravity of the slurry is made constant between a plurality of batches.

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