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:
Dec. 01, 2015
Filed:
Mar. 22, 2011
Takahiro Kawaguchi, Shiga, JP;
Katsutoshi Fujiwara, Shiga, JP;
Yoshinari Kato, Shiga, JP;
Hisatoshi Aiba, Shiga, JP;
Takahiro Kawaguchi, Shiga, JP;
Katsutoshi Fujiwara, Shiga, JP;
Yoshinari Kato, Shiga, JP;
Hisatoshi Aiba, Shiga, JP;
NIPPON ELECTRIC GLASS CO., LTD., Otsu-shi, Shiga, JP;
Abstract
The present invention is aimed to provide a method for producing a glass substrate with a thickness of not more than 200 μm, which is satisfied with the quality required for a substrate on which a thin-film electric circuit is formed, and a sheet glass substrate obtained according to this method. The present invention is concerned with a method for producing a glass substrate having a sheet thickness of from 10 to 200 μm, including a forming step of forming a molten glass into a ribbon shape in accordance with a down draw method, an annealing step of annealing the glass ribbon, and a cutting step of cutting the glass ribbon to give a glass substrate, wherein an average cooling rate in a temperature range of from the (annealing point+200° C.) to the (annealing point+50° C.) is controlled to the range of from 300 to 2,500° C./min.