POLYIMIDE PRECURSOR, POLYIMIDE, FLEXIBLE SUBSTRATE USING SAME, COLOR FILTER AND MANUFACTURING METHOD THEREFOR, AND FLEXIBLE DISPLAY DEVICE

摘要

The present invention is directed to a polyimide precursor having a unit structure expressed by a general formula (1) and a unit structure expressed by a general formula (2).
(In the general formulas (1) and (2), X 1 to X 4 each independently represent a hydrogen atom, a monovalent organic group with 1 to 10 carbon atoms or a monovalent alkylsilyl group with 1 to 10 carbon atoms. R 1 is represented by a general formula (3) and R 2 is represented by a general formula (4).)
(In the general formula (4), R 3 and R 4 each independently represent a monovalent organic group with 1 to 10 carbon atoms.) According to the present invention, there is provided a polyimide precursor which does not cause white turbidity, cracking and foaming of a film irrespective of the curing condition of the polyimide resin film. There is also provided a flexible TFT array, a flexible color filter and a flexible substrate with a gas barrier layer and a flexible display panel prepared therewith.