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:
Nov. 28, 2023
Filed:
Apr. 07, 2020
Rayitek Hi-tech Film Company, Ltd., Shenzhen, Shenzhen, CN;
Ohio State Innovation Foundation, Columbus, OH (US);
Karthikeyan Perumal, Columbus, OH (US);
Jonathan Robert Parquette, Hilliard, OH (US);
Kuppusamy Kanakarajan, Dublin, OH (US);
Xi Ren, Yueyang, CN;
ZhenZhong Wang, Zhuzhou, CN;
RAYITEK Hi-Tech Film Company, Ltd., Shenzhen, Shenzhen, CN;
Ohio State Innovation Foundation, Columbus, OH (US);
Abstract
A method of preparing a colorless transparent copolyamide-imide resin solution and its fabrication as a thin film has been disclosed. The method details formulations derived from a reaction between one or more units of dianhydride and one or more units of diamine monomers with one or more of the monomers containing fluorine atoms in their structural unit. It enables the fabrication of thin films with superior thermal and mechanical properties along with co-efficient of thermal expansion values as low as 2 ppm/° C. and a tensile modulus as high as 9 GPa. The transparent copolyamide-imide film thus prepared has the potential for utilization in flexible displays such as substrates for thin film transistors (TFT), touch sensor panels (TSP) and cover window in organic light emitting diode (OLED) and liquid crystal display (LCD) applications.