Patent ID: 8029687
Filing Date: 2011-10-04
Classification: B24B,C03C,C09K,G11B

Abstract:
1. A method for producing a crystallized glass substrate for an information recording medium, comprising providing a polishing slurry between a polishing member and a surface of a crystallized glass substrate having at least on the surface thereof an amorphous phase moiety and a crystalline phase moiety, and effecting a relative motion between the glass substrate and the polishing member to polish the glass substrate, wherein the polishing slurry comprises a silica abrasive and a ceria abrasive, wherein the silica abrasive content is 0.2 mass % or more to less than 2 mass % and the ceria abrasive content is 0.6 mass % or more to less than 1 mass %, based on the entire polishing slurry.