Title:
GLASS SUBSTRATE AND PROCESS FOR PRODUCING GLASS SUBSTRATE
Document Type and Number:
WIPO Patent Application WO/2013/099768
Kind Code:
A1
Abstract:
A process for producing a glass substrate, characterized by including: (a) a step of forming a molten glass having a temperature (T2) of 1500°C or lower on a tin melt having an iron concentration of 100ppm or more into a glass ribbon which has a temperature (T4) of 1100°C or lower and which exhibits a log ρ of 8.8 or more; and (b) a step of cooling the glass ribbon to room temperature to form a glass substrate. The term "temperature (T2)" refers to a temperature at which the logarithm of the viscosity (η) (dPa·s) is 2, while the term "temperature (T4)" refers to a temperature at which the logarithm of the viscosity (η) (dPa·s) is 4. Further, the symbol "ρ" refers to a volume resistivity (Ω·cm) at 150°C.
Inventors:
SASAI JUN (JP)
KONDO YUKI (JP)
NAKAHARA YO (JP)
HIROMATSU KUNIAKI (JP)
HAYASHI HIDEAKI (JP)
KONDO YUKI (JP)
NAKAHARA YO (JP)
HIROMATSU KUNIAKI (JP)
HAYASHI HIDEAKI (JP)
Application Number:
PCT/JP2012/083117
Publication Date:
July 04, 2013
Filing Date:
December 20, 2012
Export Citation:
Assignee:
ASAHI GLASS CO LTD (JP)
International Classes:
C03B18/08; C03B18/02; C03C3/087; H01L31/04
Domestic Patent References:
| WO2009096611A1 | 2009-08-06 | |||
| WO2010125981A1 | 2010-11-04 |
Foreign References:
| JP2010538963A | 2010-12-16 | |||
| JP2011173757A | 2011-09-08 | |||
| JP2009107914A | 2009-05-21 |
Attorney, Agent or Firm:
ITOH, Tadashige et al. (JP)
Tadashige Ito (JP)
Tadashige Ito (JP)
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