PROCESS FOR PRODUCING GLASS SUBSTRATE FOR INFORMATION RECORDING MEDIUM AND INFORMATION RECORDING MEDIUM CONTAINING GLASS SUBSTRATE PRODUCED BY THE PROCESS

摘要

A glass substrate containing alkali ions is treated by immersion in a melt of a pyrosulfate (potassium pyrosulfate, sodium pyrosulfate, etc.) and/or a melt of a hydrogen sulfate (potassium hydrogen sulfate, sodium hydrogen sulfate, etc.) and then cleaned. At least a recording layer is formed on the treated glass substrate to produce an information recording medium.