Invention Grant
- Patent Title: Method of manufacturing a glass substrate for a magnetic disk
- Patent Title (中): 制造磁盘用玻璃基板的方法
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Application No.: US13122673Application Date: 2009-10-05
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Publication No.: US08821747B2Publication Date: 2014-09-02
- Inventor: Takanori Mizuno , Yosuke Suzuki
- Applicant: Takanori Mizuno , Yosuke Suzuki
- Applicant Address: JP Tokyo
- Assignee: Hoya Corporation
- Current Assignee: Hoya Corporation
- Current Assignee Address: JP Tokyo
- Agency: Amster, Rothstein & Ebenstein, LLP
- Priority: JP2008-260593 20081007; JP2009-025586 20090206
- International Application: PCT/JP2009/067331 WO 20091005
- International Announcement: WO2010/041623 WO 20100415
- Main IPC: C25F3/00
- IPC: C25F3/00 ; C03C25/68 ; C09K13/08
Abstract:
A method for manufacturing a glass substrate for a magnetic disk comprises a surface grinding step of processing a mirror-surface plate glass, having a main surface in the form of a mirror surface, to a required flatness and surface roughness using fixed abrasive particles. The method comprises, before the surface grinding step using the fixed abrasive particles, a surface roughening step of roughening the surface of the mirror-surface plate glass by frosting.
Public/Granted literature
- US20110204028A1 METHOD OF MANUFACTURING A GLASS SUBSTRATE FOR A MAGNETIC DISK Public/Granted day:2011-08-25
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