POLYIMIDE PRECURSOR, POLYIMIDE, AND POLYIMIDE FILM

摘要

The present invention relates to a polyimide precursor characterized in comprising repeating units represented by chemical formula (1A) and repeating units represented by chemical formula (2A). (in the formula, A1 is a divalent group with an aromatic ring, and each of R1 and R2 independently is a hydrogen, a C1-6 alkyl group or C3-9 alkylsilyl group.) (in the formula, A2 is a divalent group with an aromatic ring, and each of R3 and R4 independently is a hydrogen, a C1-6 alkyl group or C3-9 alkylsilyl group.)