| 摘要 |
<p>A manufacturing method of a glass substrate for a magnetic disc, including a cooling step for cooling the glass substrate after a chemical strengthening process for carrying out ion exchange by dipping the glass substrate into chemical strengthening processing solvent. The invention is characterised by, while cooling surrounding medium of a holder 100 holding the glass substrate 10, also carry out temperature control so that the change of temperature is uniformised in the surface of the glass substrate.</p> |
