METHOD FOR MANUFACTURING GLASS SUBSTRATE FOR INFORMATION RECORDING MEDIUM AND MAGNETIC DISC USING SUCH METHOD

摘要

In a method for manufacturing a glass substrate for an information recording medium having SiO2 as a main component, an abrasive and foreign materials adhered on the substrate are surely removed without making a cleaning step complicated. The manufacturing method includes a step of bringing the surface of the substrate into contact with a liquid having a Si element elusion quantity within a range of 100-10,000ppb/mm2, after a polishing step but prior to starting a scrub cleaning step.