发明名称 |
METHOD OF PRODUCING GLASS SUBSTRATE FOR PERPENDICULAR MAGNETIC RECORDING DISK |
摘要 |
A glass substrate for perpendicular magnetic recording, having a surface with an average surface roughness of 2.0 � or less and surface height variations of 1 � or less with wavelengths in the range of 0.05 mm-0.5 mm in both radial and circumferential directions, is produced by rotating a glass substrate, supplying polishing slurry containing a specified amount of abrading particles of artificial diamond on its surface, pressing a polishing tape on the surface and causing this polishing tape to travel in a direction opposite to the direction of rotation of the glass substrate. |
申请公布号 |
US2009163117(A1) |
申请公布日期 |
2009.06.25 |
申请号 |
US20090394461 |
申请日期 |
2009.02.27 |
申请人 |
NIHON MICRO COATING CO., LTD. |
发明人 |
HORIE YUJI;TANIFUJI TATSUYA;KUMASAKA NORIYUKI |
分类号 |
B24B7/24;B24B21/00;B05D1/00;B05D3/00;B24B7/26;B24B21/04;B24B37/00;B24B37/04;B32B1/00;C03C19/00;C03C21/00;G11B5/73;G11B5/84 |
主分类号 |
B24B7/24 |
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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