| 摘要 |
<p>This method for producing an HDD glass substrate is provided with a fused glass supply step, a press-molding step, a heat treatment step, a coring step, a grinding step, a polishing step, and a cleaning step, and is characterized by the sheet thickness (TIR) of one circuit in the peripheral direction at a position that is 0.75r1 from the center of the glass blanks produced in the coring step before the grinding step, where r1 is the radius of the glass blanks, being no greater than 10 µm. The present invention is able to provide a method for producing an HDD glass substrate that is superior in reducing read/write errors and head crashes and reducing the amount of head floatation when the glass substrate is loaded in a hard disk drive having a DFH mechanism.</p> |
