| 摘要 |
<p>MANUFACTURING METHOD AND MANUFACTURING APPARATUS OF GLASS SUBSTRATE FOR MAGNETIC DISC AND MANUFACTURING METHOD OF MAGNETIC DISC A bottom wall part 19 of a holder main body 17 of a work holder is attached on a table 5, a shaft 12 is provided perpendicularly to the bottom wall part 19, a plurality of glass substrates 2 are laminated on the bottom wall part 19 and positioned so as to allow the shaft 12 to penetrate an inner hole of the glass substrates, while the positioned glass substrates 2 are pressed from above by a pressing portion 22 of a holder cover 18 of the work holder, the shaft 12 is removed from the communicating inner hole of the glass substrates 2, and a polishing brush is inserted into the inner hole for polishing.</p> |
