Invention Application
- Patent Title: GLASS SUBSTRATE FOR DISPLAY AND METHOD FOR PRODUCING SAME
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Application No.: US15740909Application Date: 2016-06-28
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Publication No.: US20180186684A1Publication Date: 2018-07-05
- Inventor: Manabu ICHIKAWA , Akihiro KOYAMA
- Applicant: AvanStrate Inc.
- Applicant Address: JP Tokyo
- Assignee: AvanStrate Inc.
- Current Assignee: AvanStrate Inc.
- Current Assignee Address: JP Tokyo
- Priority: JP2015-131779 20150630
- International Application: PCT/JP2016/069144 WO 20160628
- Main IPC: C03C3/093
- IPC: C03C3/093 ; C03B25/04 ; C03C3/091

Abstract:
A glass substrate that achieves a high strain point while having a low devitrification temperature; and a method for producing the glass substrate. This glass substrate for a display is made of a glass comprising SiO2 and Al2O3, comprising 0% or more to less than 4% B2O3 in mass %, and substantially devoiding Sb2O3, wherein 3×BaO/(MgO+CaO+SrO) is 5 or less, MgO/(CaO+SrO) is 0.36 or greater, the devitrification temperature is 1235° C. or lower, and the strain point is 700° C. or higher. The method comprises: melting, by using at least direct electrical heating, a glass material prepared to have a predetermined composition; forming, into a flat glass sheet, the molten glass that has been melted in the melting step; and annealing the flat glass sheet, wherein a condition for cooling the flat glass sheet is controlled so as to reduce the heat shrinkage rate of the flat glass sheet.
Public/Granted literature
- US10927034B2 Glass substrate for display and method for producing same Public/Granted day:2021-02-23
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