| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a method for manufacturing a plate-like glass material excellent in flatness. <P>SOLUTION: A method for manufacturing a glass substrate for a magnetic disk having a pair of main surfaces includes a falling step for making a lump of melted glass fall, a pressing step for molding a plate-like glass material by inserting the lump between planes of a pair of dies facing each other and having the almost same temperature from both sides of a falling path of the lump at the same timing to perform press molding, and a processing step for processing the plate-like glass material. In the falling step, the lump falls down while rotating around a falling axis as a center. <P>COPYRIGHT: (C)2013,JPO&INPIT |
