发明名称 |
Lubricant for magnetic disks, method for producing the lubricant used in the magnetic disks, and method for manufacturing the same |
摘要 |
The present invention provides a lubricant for forming a lubricating layer which is useful in preventing fly and stiction and/or corrosion at an extremely small flying height of 10 nm or less, which is prevented from migrating at a high rotational speed of 5400 rpm or more, which has high adhesion, and which is suitable for a load/unload method. A crude lubricant containing at least one perfluoropolyether is degassed and then purified. Alternatively, a liquid crude lubricant containing at least one perfluoropolyether is purified by vaporizing the crude lubricant and then liquefying the vapor of the perfluoropolyether within a distance less than the mean free path of molecules of the perfluoropolyether. A magnetic disk is prepared in such a manner that a carbonaceous protective layer is formed above a substrate and a lubricating layer is formed on the protective layer using of the lubricant. The lubricant contains the perfluoropolyether and has a molecular weight distribution of 1.3 or less.
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申请公布号 |
US8012920(B2) |
申请公布日期 |
2011.09.06 |
申请号 |
US20050586150 |
申请日期 |
2005.01.12 |
申请人 |
WD MEDIA (SINGAPORE) PTE. LTD. |
发明人 |
SHIMOKAWA KOICHI |
分类号 |
C10M147/04;C07C43/17;C10M107/38;C10M145/24;C10M169/04;C10M177/00;G11B5/725;G11B5/84 |
主分类号 |
C10M147/04 |
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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