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