发明授权
- 专利标题： Method for producing glass substrate and method for producing magnetic recording medium
- 专利标题（中）： 玻璃基板的制造方法及磁记录介质的制造方法
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申请号： US13124029申请日： 2009-09-11
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公开(公告)号： US09190096B2公开(公告)日： 2015-11-17
- 发明人: Kenichi Sasaki , Hideki Kawai
- 申请人： Kenichi Sasaki , Hideki Kawai
- 申请人地址： JP Tokyo
- 专利权人： HOYA CORPORATION
- 当前专利权人： HOYA CORPORATION
- 当前专利权人地址： JP Tokyo
- 代理机构： Brinks Gilson & Lione
- 优先权： JP2008-268410 20081017
- 国际申请： PCT/JP2009/065916 WO 20090911
- 国际公布： WO2010/044325 WO 20100422
- 主分类号： G11B5/84
- IPC分类号： G11B5/84 ; H01L21/67
摘要：
Disclosed is a method for producing a glass substrate, which involves a first polishing step and a second polishing step both for polishing the surface of the glass substrate with a polishing solution containing a polishing agent. The method is characterized by additionally involving a heating step for heating the glass substrate, wherein the heating step is carried out after the first polishing step and before the second polishing step.