发明名称 |
METHOD FOR MANUFACTURING GLASS SUBSTRATE FOR MAGNETIC RECORDING MEDIUM |
摘要 |
The present invention relates to a method for manufacturing a disk-shaped glass substrate for a magnetic recording medium, having a circular hole at the center thereof, the method including: a shape-forming step of performing shape forming to a glass substrate having a sheet shape; a polishing step of polishing a main surface of the glass substrate; and a cleaning step of cleaning the glass substrate, in which the polishing step includes a finish polishing step of simultaneously polishing both main surfaces of the glass substrate using a polishing slurry containing abrasives having an average particle diameter of 100 nm or less; and the glass substrate polished in the finish polishing step has a thickness deviation among glass substrates polished in the same lot of 1.5μm or less.
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申请公布号 |
US2011212669(A1) |
申请公布日期 |
2011.09.01 |
申请号 |
US201113033940 |
申请日期 |
2011.02.24 |
申请人 |
ASAHI GLASS COMPANY, LIMITED |
发明人 |
MOMOSE TORU;TAMADA MINORU |
分类号 |
B24B1/00;B24B37/00;B24B37/10;G11B5/73;G11B5/84 |
主分类号 |
B24B1/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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