Method for producing glass substrate and method for producing magnetic recording medium

摘要

Disclosed is a method for producing a glass substrate, which involves a first polishing step and a second polishing step both for polishing the surface of the glass substrate with a polishing solution containing a polishing agent. The method is characterized by additionally involving a heating step for heating the glass substrate, wherein the heating step is carried out after the first polishing step and before the second polishing step.

主权项

1. A method for producing a glass substrate comprising successively:
polishing a surface of the glass substrate with a first polishing liquid containing a first polishing agent; heating the glass substrate in a heating chamber at or between 100° C. to 300° C. to heat all of the glass substrate so as to dry the glass substrate; and subsequent to the heating, polishing the surface of the glass substrate with a second polishing liquid containing a second polishing agent.