| abstract |
Disclosed are a polyimide having excellent characteristics such as transparency, bending resistance and high heat resistance, and also having a very low linear expansion coefficient and excellent solvent resistance, and a precursor thereof. A divalent group having a tetracarboxylic acid having at least one aliphatic 6-membered ring in the chemical structure and no aromatic ring, and at least one amide bond and an aromatic ring in the chemical structure. Or a polyamide precursor comprising a diamine compound having a divalent group having a chemical structure of the chemical formula (2). [Selection figure] None |