Title:
METHOD FOR MANUFACTURING GLASS SUBSTRATE FOR INFORMATION STORAGE MEDIUM
Document Type and Number:
WIPO Patent Application WO/2013/099585
Kind Code:
A1
Abstract:
This method involves a step (S60) in which, while supplying to the surface of a glass substrate a polishing liquid containing, as abrasive grains, any of cerium oxide, zirconium oxide and zirconium silicate, the surface of the glass substrate is roughly polished by sliding contact with a polishing pad, a step (S65) in which, after the glass substrate has been removed from the polishing pad, the surface of the glass substrate is acid-washed while supplying an acidic cleaning liquid to the surface of the glass substrate, and a step (S70) for forming a compressive stress layer on the surface of the glass substrate after acid washing. When the glass substrate is removed from the polishing pad, said removal is performed with the glass substrate in a state in contact with the liquid having a 0.5-10w% abrasive grain concentration.
Inventors:
NAKAE HAZUKI (JP)
Application Number:
PCT/JP2012/082015
Publication Date:
July 04, 2013
Filing Date:
December 11, 2012
Export Citation:
Assignee:
KONICA MINOLTA INC (JP)
NAKAE HAZUKI (JP)
NAKAE HAZUKI (JP)
International Classes:
G11B5/84
Foreign References:
| JP2000348338A | 2000-12-15 | |||
| JP2005108306A | 2005-04-21 | |||
| JP2011154773A | 2011-08-11 | |||
| JP2003036522A | 2003-02-07 |
Attorney, Agent or Firm:
Fukami Patent Office, p. c. (JP)
Patent business corporation Fukami patent firm (JP)
Patent business corporation Fukami patent firm (JP)
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Claims: