Invention Grant
- Patent Title: Glass substrate for display and method for producing same
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Application No.: US15740906Application Date: 2016-06-28
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Publication No.: US11069716B2Publication Date: 2021-07-20
- Inventor: Manabu Ichikawa
- Applicant: AvanStrate Inc.
- Applicant Address: JP Tokyo
- Assignee: AvanStrate Inc.
- Current Assignee: AvanStrate Inc.
- Current Assignee Address: JP Tokyo
- Agency: Sughrue Mion, PLLC
- Priority: JPJP2015-131780 20150630
- International Application: PCT/JP2016/069145 WO 20160628
- International Announcement: WO2017/002808 WO 20170105
- Main IPC: H01L27/12
- IPC: H01L27/12 ; C03C3/091 ; C03B5/027 ; C03B25/08 ; H01L29/786 ; C03B17/06 ; C03B25/04 ; C03C3/093 ; G02F1/1333 ; G02F1/1368 ; H01L27/32

Abstract:
Provided are: a glass substrate that achieves a high strain point while having a low devitrification temperature; and a method for producing said glass substrate. This glass substrate for a display is made of a glass comprising SiO2 and Al2O3, comprising 0% or more to less than 3% B2O3 and from 5 to 14% BaO in mass %, and substantially devoiding Sb2O3, wherein the devitrification temperature is 1235° C. or lower and the strain point is 720° C. or higher. Alternatively, this glass substrate for a display is made of a glass comprising SiO2 and Al2O3, comprising 0% or more to less than 3% B2O3, 1.8% or more MgO, and from 5 to 14% BaO in mass %, and substantially devoiding Sb2O3, wherein (SiO2+MgO+CaO)—(Al2O3+SrO+BaO) is less than 42%, the devitrification temperature is 1260° C. or lower, and the strain point is 720° C. or higher. This method for producing said glass substrate for a display comprises: a melting step for melting, by using at least direct electrical heating, a glass material prepared to have a predetermined composition; a forming step for forming, into a flat glass sheet, the molten glass that has been melted in the melting step; and an annealing step for 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
- US20180190675A1 GLASS SUBSTRATE FOR DISPLAY AND METHOD FOR PRODUCING SAME Public/Granted day:2018-07-05
Information query
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