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. 31, 2023
Filed:
Aug. 08, 2017
Dai Nippon Printing Co., Ltd., Tokyo-to, JP;
Katsuya Sakayori, Tokyo-to, JP;
Koudai Okada, Tokyo-to, JP;
Ayako Furuse, Tokyo-to, JP;
Keisuke Wakita, Tokyo-to, JP;
Yoshihiro Kobayashi, Tokyo-to, JP;
Aya Takao, Tokyo-to, JP;
Takanori Maeda, Tokyo-to, JP;
Nahomi Kanazawa, Tokyo-to, JP;
Takayuki Ota, Tokyo-to, JP;
DAI NIPPON PRINTING CO., LTD., Tokyo, JP;
Abstract
A polyimide film includes a polyimide in which a specific amount of molecular framework containing one or two silicon atoms in its main chain, wherein a total light transmittance measured in accordance with JIS K7361-1 is 85% or more; wherein a yellowness index calculated in accordance with JIS K7373-2006 is 30 or less; wherein a glass transition temperature is in a temperature range of from 150° C. to 400° C.; and wherein a tensile elastic modulus at 25° C. obtained by measuring a 15 mm×40 mm test piece at a tensile rate of 10 mm/min and a chuck distance of 20 mm in accordance with JIS K7127, is 1.8 GPa or more.