| abstract |
(assignment) Disclosed is a polyimide excellent in heat expansion, excellent in film forming property, easily peelable from a support substrate, and excellent in heat resistance and transparency, and a precursor thereof. (Solution) A polyimide precursor comprising a structural unit derived from a diamine and a structural unit derived from an acid dianhydride, wherein the polyimide precursor comprises: i) a structural unit derived from an aromatic diamine represented by the following formula (1); and ii) a structural unit derived from 2,2'-bis A polyimide precursor having a structural unit derived from 1,2,3,4-cyclobutane tetracarboxylic dianhydride, and a polyimide obtained by imidizing the polyimide precursor. (In the formula (1), Z is NH or O) |