Patent ID: 9181381
Filing Date: 2015-11-10
Classification: C08F,C08G,C09D,G03F,H05K

Abstract:
1. A photosensitive resin composition containing a polyimide precursor consisting essentially of structural units represented by the following formulas (1), (2) and (3), wherein the proportion of the structural unit represented by formula (3) in the polyimide precursor is 5-60 mol %: wherein in formula (1), X is a tetravalent aromatic group formed by removing the carboxyl groups from an aromatic tetracarboxylic acid, and the tetravalent aromatic group comprises a group derived from pyromellitic dianhydride; Y is a divalent aromatic group formed by removing the amino groups from an aromatic diamine, and Y contains an ester group (—COO—); and wherein in formulas (2) and (3), Ar is a tetravalent aromatic group formed by removing the carboxyl groups from an aromatic tetracarboxylic acid, and the tetravalent aromatic group comprises a group derived from pyromellitic dianhydride; each of R