METHOD FOR MANUFACTURING GLASS SUBSTRATE FOR MAGNETIC DISC

摘要

A method for manufacturing a glass substrate for a magnetic disc so as to suppress the formation of cleaning stains on the main surface of the glass substrate, the method including a process for cleaning the surface of the glass substrate and a process for drying the surface that has been subjected to the cleaning process. The cleaning process includes a first liquid process for immersing the glass substrate in a first liquid that contains water and a water-soluble solvent that has a lower boiling point than the boiling point of water. The first liquid contains the water-soluble solvent as a main component and contains 3.0% by weight or more of water. Alternatively, the drying process includes disposing the glass substrate in the vapor of a second liquid that contains water and a water-soluble solvent that has a lower boiling point than the boiling point of water, and, while liquid droplets are formed on the surface of the glass substrate, some of the droplets on the glass substrate are caused to fall off of the glass substrate. The second liquid contains the water-soluble solvent as a main component and contains more than 1.0% by weight of water.