abstract |
The present invention relates to polyimide precursors and their applications. The present invention provides an amic acid ester oligomer having the structure of formula (1) or (1'): wherein G, P, R, Rx , D, E and m are as defined in the specification. The present invention also provides a polyimide precursor composition comprising the above-mentioned amic acid ester oligomer, and a polyimide obtained from the above-mentioned composition. |