Title:
GLASS SUBSTRATE, METHOD FOR PRODUCING GLASS SUBSTRATE, AND COVER GLASS
Document Type and Number:
WIPO Patent Application WO/2013/065648
Kind Code:
A1
Abstract:
Provided is a glass substrate which has both excellent scratch strength and excellent bending strength.
A glass substrate having a laminate configuration wherein a high expansion layer and a low expansion layer, which is thinner than the high expansion layer and has a lower thermal expansion coefficient than the high expansion layer, are laminated and the low expansion layer serves as a surface layer. This glass substrate comprises: a tensile stress layer that is formed of the high expansion layer in which a tensile stress is generated due to the laminate configuration; a laminate reinforcing layer that is formed of the low expansion layer in which a compressive stress is generated due to the laminate configuration; and a chemical reinforcing layer that is the outermost part of the low expansion layer serving as the surface layer, in said outermost part a compressive stress being generated by a chemical reinforcing treatment. The thickness of the chemical reinforcing layer is not more than the thickness of the laminate reinforcing layer.
Inventors:
OMORI NORIFUMI (JP)
WAKATSUKI HIROSHI (JP)
MASUDA KENICHI (JP)
NAKAGAWA KOJI (JP)
YAGURA TAKUMI (JP)
WAKATSUKI HIROSHI (JP)
MASUDA KENICHI (JP)
NAKAGAWA KOJI (JP)
YAGURA TAKUMI (JP)
Application Number:
PCT/JP2012/077918
Publication Date:
May 10, 2013
Filing Date:
October 29, 2012
Export Citation:
Assignee:
ASAHI GLASS CO LTD (JP)
International Classes:
C03C21/00; C03B23/203; G09F9/00; C03C3/085; C03C3/087
Foreign References:
| JP2011093728A | 2011-05-12 | |||
| JP2008522950A | 2008-07-03 |
Attorney, Agent or Firm:
SENMYO, Kenji et al. (JP)
Spring name Kenji (JP)
Spring name Kenji (JP)
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Claims: