| abstract |
PROBLEM TO BE SOLVED: To sufficiently remove foreign substances such as abrasives and glass shavings while suppressing a change in shape of a texture formed on a glass substrate surface, and to operate a reading apparatus. Provided is a method for manufacturing a glass substrate for an information recording medium, which can obtain stability. SOLUTION: When the acid resistance of a glass substrate is defined as the maximum depth at which components other than silica elute when immersed in 1% by weight of sulfuric acid at 50 ° C. for 1 minute, the acid resistance is 0.5%. What is 10 nm to 10 nm is used. The magnetic disk glass substrate is subjected to a disk processing step 11, an inner and outer peripheral end chamfering step 12, a main surface polishing step 13, a chemical strengthening step 14, an acid treatment step 15, a texture processing step 16, an acid treatment step and an alkali treatment step 17, Manufactured. By performing the acid treatment after the texturing, abrasives and glass shavings are removed based on the etching action. |