Patent ID: 6664021
Filing Date: 2003-12-16
Classification: C08G,C08L,G03F

Abstract:
A negative photosensitive resin composition which comprises (a) an acid generating compound for generating an acid by light irradiation and (b) a silicon-containing polyimide ester precursor comprising a partially esterified silicon-containing polyamic acid ester obtained from (i) A mols of a derivative of a tetracarboxylic dianhydride, said derivative formed by reacting 1 to 2 mols of a monovalent saturated alcohol with 1 mol of the tetracarboxylic dianhydride, (ii) B mols of a diamine and (iii) C mols of an aminosilicon compound represented by the formula (1)H2Nâ€”R1â€”SiR23âˆ’kXkâ€ƒâ€ƒ(1) wherein R1 is â€”(CH2)sâ€”, s is an integer of from 1 to 4; R2 is independently an alkyl group having 1 to 6 carbon atoms, a phenyl group or a phenyl group substituted by an alkyl group having 7 to 12 carbon atoms; X is a hydrolytic alkoxy group; and k is 1&lE;k&lE;3 in a ratio meeting the following formulae (2) and (3) 1&leq;CA-B&leq;2.5(2)0.1&leq;CB+C&leq;1,(3)wherein, upon exposure of said composition to light, the acid generating compound generates acid, which causes a silane at the end of the silicon-containing partially esterified polyimide ester precursor to undergo a siloxane condensation reaction and a subsequent intermolecular cross-linking reaction with another silane.