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:
Jul. 11, 2023
Filed:
Aug. 07, 2019
Rayitek Hi-tech Film Company, Ltd., Shenzhen, Shenzhen, CN;
Jiaxing Rayitek Film Technology Co., Ltd., Jiaxing, CN;
YanYan Jiang, Shangrao, CN;
ZhenZhong Wang, Zhuzhou, CN;
Xi Ren, Yueyang County, CN;
Wei Zhang, Guilin, CN;
RAYITEK Hi-Tech Film Company, Ltd., Shenzhen, Shenzhen, CN;
Jiaxing RAYITEK Film Technology Co., Ltd., Jiaxing, CN;
Abstract
A polyimide film contains fluorinated substituents and cardo structures. The polyimide film exhibits excellent heat-resistance, transparency and mechanical properties. The polyimide film has a glass-transition temperature (Tg) of at least 360° C., a coefficient of thermal expansion (CTE) of 50 ppm/° C. or lower, a modulus of at least 4.0 Gpa, a b* value of 5 or lower and yellowness index of 8 or less. The polyimide film can be used as a display substrate or an optical film in a liquid crystal display (LCD), an organic light-emitting diode (OLED) and in other fields where the characteristic features are required.