发明申请
US20110189506A1 GLASS SUBSTRATE FOR MAGNETIC RECORDING MEDIUM, AND METHOD FOR MANUFACTURING THE SAME
审中-公开
用于磁记录介质的玻璃基板及其制造方法
- 专利标题： GLASS SUBSTRATE FOR MAGNETIC RECORDING MEDIUM, AND METHOD FOR MANUFACTURING THE SAME
- 专利标题（中）： 用于磁记录介质的玻璃基板及其制造方法
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申请号： US13017609申请日： 2011-01-31
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公开(公告)号： US20110189506A1公开(公告)日： 2011-08-04
- 发明人: Kazuo Mannami , Hitoshi Mishiro , Norihito Shida , Masabumi Ito , Hiroyuki Masuda , Toru Momose
- 申请人： Kazuo Mannami , Hitoshi Mishiro , Norihito Shida , Masabumi Ito , Hiroyuki Masuda , Toru Momose
- 申请人地址： JP Chiyoda-ku
- 专利权人： Asahi Glass Company, Limited
- 当前专利权人： Asahi Glass Company, Limited
- 当前专利权人地址： JP Chiyoda-ku
- 优先权： JP2010-020520 20100201
- 主分类号： G11B5/82
- IPC分类号： G11B5/82 ; B24B1/00 ; G11B5/73
摘要：
The present invention relates to a glass substrate for a magnetic recording medium, which is a disk-shaped glass substrate for a magnetic recording medium having a circular hole at the center thereof, in which the glass substrate for a magnetic recording medium has an inner peripheral side surface, an outer peripheral side surface and both main surfaces, and the both main surfaces have parallelism of 3.2 μm or less in at least a recording and reproducing region thereof.
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