PRODUCTION METHOD FOR GLASS SUBSTRATE FOR INFORMATION RECORDING MEDIUM

摘要

A production method for a glass substrate, comprising: a step in which the glass substrate is polished; and steps in which, after the glass substrate has been polished; the glass substrate is cleaned. The steps in which the glass substrate is cleaned include: a step in which the glass substrate is cleaned inside each of a plurality of first tanks having a tank interior surface comprising stainless steel or resin; and a step in which the glass substrate is cleaned inside a second tank having a tank interior surface comprising quartz. The step in which the glass substrate is cleaned inside each of the plurality of first tanks includes at least one instance of ultrasonic cleaning. The step in which the glass substrate is cleaned inside the second tank occurs after the step has been completed in which the glass substrate is cleaned inside each of the plurality of first tanks.