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:
Feb. 15, 2022
Filed:
Feb. 01, 2019
Agc Inc., Chiyoda-ku, JP;
Shuhei Nomura, Tokyo, JP;
Kazutaka Ono, Tokyo, JP;
AGC INC., Chiyoda-ku, JP;
Abstract
An alkali-free glass substrate which is a glass substrate includes, as represented by molar percentage based on oxides, 0.1% to 10% of ZnO. The alkali-free glass substrate has an average coefficient of thermal expansion αat 50 to 100° C. of from 2.70 ppm/° C. to 3.20 ppm/° C., an average coefficient of thermal expansion αat 200 to 300° C. of from 3.45 ppm/° C. to 3.95 ppm/° C., and a value α/αobtained by dividing the average coefficient of thermal expansion αat 200 to 300° C. by the average coefficient of thermal expansion αat 50 to 100° C. of from 1.20 to 1.30.