| 摘要 |
PROBLEM TO BE SOLVED: To provide a magnetic recording medium manufacturing method that can provide a magnetic recording medium for which roll-off at a substrate edge is suppressed, can reduce production cost, and is suitable for automation. SOLUTION: The magnetic recording medium substrate manufacturing method includes mechanically grinding a processed substrate made of single-crystal silicon or a processed substrate made of polycrystal with an ultra abrasive grain grindstone or abrasive grains while switching grinding conditions at two or more levels, thereby causing a mechanically damaged layer of a machined surface after grinding to be 1μm or less. COPYRIGHT: (C)2009,JPO&INPIT
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