Title:
METHOD FOR MANUFACTURING GLASS SUBSTRATE FOR INFORMATION RECORDING MEDIUM AND MAGNETIC DISC USING SUCH METHOD
Document Type and Number:
WIPO Patent Application WO/2008/004472
Kind Code:
A1
Abstract:
In a method for manufacturing a glass substrate for an information recording
medium having SiO2 as a main component, an abrasive and foreign materials adhered
on the substrate are surely removed without making a cleaning step complicated.
The manufacturing method includes a step of bringing the surface of the substrate
into contact with a liquid having a Si element elusion quantity within a range
of 100-10,000ppb/mm2, after a polishing step but prior to starting a scrub cleaning
step.
Inventors:
KAWAI HIDEKI (JP)
NAKATSUJI YUKITOSHI (JP)
SAWADA HIROAKI (JP)
SAEKI SHINICHI (JP)
NAKATSUJI YUKITOSHI (JP)
SAWADA HIROAKI (JP)
SAEKI SHINICHI (JP)
Application Number:
PCT/JP2007/062868
Publication Date:
January 10, 2008
Filing Date:
June 27, 2007
Export Citation:
Assignee:
KONICA MINOLTA OPTO INC (JP)
KAWAI HIDEKI (JP)
NAKATSUJI YUKITOSHI (JP)
SAWADA HIROAKI (JP)
SAEKI SHINICHI (JP)
KAWAI HIDEKI (JP)
NAKATSUJI YUKITOSHI (JP)
SAWADA HIROAKI (JP)
SAEKI SHINICHI (JP)
International Classes:
G11B5/84; C03C23/00
Foreign References:
| JP2003146667A | 2003-05-21 | |||
| JP2002074653A | 2002-03-15 | |||
| JP2003346316A | 2003-12-05 | |||
| JP2000311336A | 2000-11-07 | |||
| JP2004145958A | 2004-05-20 | |||
| JP2001344743A | 2001-12-14 |
Attorney, Agent or Firm:
SANO, Shizuo (2-6 Tenmabashi-Kyomachi, Chuo-K, Osaka-Shi Osaka 32, JP)
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