| 摘要 |
PROBLEM TO BE SOLVED: To provide a glass substrate for a magnetic disk having a desired edge shape via a plurality of grinding processes. SOLUTION: In a preceding grinding process wherein under the supply of a grinding fluid containing grinding abrasive grains 40 of large diameter, a glass substrate 1 and a hard grinding pad 10 are moved relatively so as to achieve grinding, there occurs a shape such that edges of a major surface of the glass substrate 1 descend relatively to the central part thereof (roll-off). Thus, in a following grinding process, using a grinding fluid containing grinding abrasive grains 50 of small diameter and a grinding pad 20 softer than the grinding pad 10, there is performed grinding such that if a glass substrate with flat edges is ground, a glass substrate 100 whose edges of the major surface protrude relatively to the central part thereof (ski jump) is obtained. As a result, the glass substrate can be modified toward compensating the roll-off generated in the preceding grinding step, so that the configuration of the edges approach flatness. COPYRIGHT: (C)2008,JPO&INPIT
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