发明名称 |
METHOD OF MANUFACTURING A GLASS SUBSTRATE FOR A MAGNETIC DISK, GLASS SUBSTRATE FOR A MAGNETIC DISK, METHOD OF MANUFACTURING A MAGNETIC DISK, AND MAGNETIC DISK |
摘要 |
Provided is a method of manufacturing a magnetic disk glass substrate, wherein, in a main surface polishing process, main surface polishing is applied to one of main surfaces of a glass substrate so that the one main surface has a predetermined arithmetic mean roughness, and main surface polishing is applied to the other main surface of the glass substrate so that the other main surface has a roughness which is higher than the arithmetic mean roughness (Ra) of the one main surface and which is low enough to prevent a component forming the magnetic disk glass substrate from being eluted from the other main surface.
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申请公布号 |
US2011165439(A1) |
申请公布日期 |
2011.07.07 |
申请号 |
US200913063106 |
申请日期 |
2009.09.02 |
申请人 |
HOYA CORPORATION;HOYA GLASS DISK (THAILAND) LTD. |
发明人 |
NISHIMORI KENICHI;TOMONAGA TADASHI |
分类号 |
G11B5/73;B05D5/12;B24B1/00;G11B5/82 |
主分类号 |
G11B5/73 |
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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