| 摘要 |
<p>MANUFACTURING METHOD OF GLASS SUBSTRATE FOR MAGNETIC RECORDING MEDIUM AND MAGNETIC RECORDING MEDIUM In the manufacturing method of a ring-shaped glass substrate for a magnetic recording medium, when a glass plate is processed to be a disc-shaped glass substrate 11, external shape thereof is formed by a laser scribe and a chamfering surface is formed by spherical center polishing. Therefore, a glass substrate for a magnetic recording medium with plane surfaces 14 and 17 and chamfering surfaces 15 and 18 without damages can be obtained.</p> |
