The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 05, 2021
Filed:
Jun. 26, 2018
Agc Inc., Chiyoda-ku, JP;
AGC Inc., Chiyoda-ku, JP;
Abstract
A glass substrate includes, as a glass matrix composition as represented by mole percentage based on oxides, SiO: 55%-75%, AlO: 2%-15%, MgO: 0%-10%, CaO: 0%-10%, SrO: 0%-10%, BaO: 0%-15%, ZrO: 0%-5%, NaO: 0%-20%, KO: 5%-30%, and LiO: 0%-5.0%. The glass substrate has a total content of alkali metal oxides, as represented by mole percentage based on oxides, of 10%-30%, a value obtained by dividing the total content of alkali metal oxides by the content of SiOof 0.50 or smaller, a value obtained by dividing the content of NaO by a value obtained by subtracting the content of AlOfrom a total content of NaO and KO of 0.90 or smaller, and an average coefficient of thermal expansion α1 at 50° C.-350° C. of 11 ppm/° C.-16 ppm/° C.