| abstract |
The present invention provides an amic acid ester oligomer having a structure of Formula (1) or (1′): n n n n n n n n n n n n wherein G, P, R, R x , D, E and m are those as defined in the specification. The present invention also provides a polyimide precursor composition or a photosensitive polyimide precursor composition comprising the amic acid ester oligomer, as well as a polyimide prepared from the composition. |