| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for manufacturing a substrate for an information recording medium with the high smoothness, and a method for manufacturing the information recording medium using the substrate. SOLUTION: In the method for manufacturing the substrate for the information recording medium by a manufacturing process including a grinding process and a polishing process from substrate material, the grinding process is performed in the atmosphere, and the polishing process and the process after it are performed in a clean room.
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