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:
Apr. 14, 2026
Filed:
Jun. 27, 2022
SK Microworks Co., Ltd., Gyeonggi-do, KR;
Han Jun Kim, Gyeonggi-do, KR;
Jin Woo Lee, Gyeonggi-do, KR;
Sang Hun Choi, Gyeonggi-do, KR;
Jin Yong Lee, Gyeonggi-do, KR;
Heung Sik Kim, Gyeonggi-do, KR;
Microworks Solutions Co., Ltd., Chungcheongnam-do, KR;
Abstract
The embodiments provide a polyamide-imide-based film, which comprises a polyamide-imide-based polymer, wherein when the coefficients of thermal expansion in the MD direction and TD direction of the film are measured at an interval of 5° C. in a temperature range of 300° C. to 365° C., respectively, the temperature at which the coefficient of thermal expansion in the MD direction or the coefficient of thermal expansion in the TD direction changes from a positive value to a negative value is 330° C. to 345° C., a process for preparing the same, and a cover window and a display device comprising the same.