GLASS SUBSTRATE FOR INFORMATION RECORDING MEDIUM AND INFORMATION RECORDING MEDIUM USING THE SAME

摘要

PURPOSE: To provide a glass substrate sufficiently satisfying required physical properties and consisting of glass without using an arsenic or antimony compound as a defoaming agent. CONSTITUTION: This substrate consists of the glass containing 0.0001-10 mol% oxide of Sn and/or oxide of Ce based on the total amount of the glass component other than the defoaming agent or the glass obtained from a glass material containing 1-10 mol% at least one selected from C, SO3 and H2O based on the total amount of the glass component. The information recording medium comprises this substrate and a magnetic layer formed on at least a part of the substrate surface.