Patent ID: 6723484
Filing Date: 2004-04-20
Classification: C08G,C08L,G03F

Abstract:
A positive-working photosensitive resin precursor composition comprising a polymer having structural units denoted by general formula (1) and a photoacid generator, wherein R1 is an organic group of the valency from 3 to 8 having at least 2 carbon atoms, R2 is an organic group of the valency from 2 to 6 having at least 2 carbon atoms, and the hydroxyl group and the amide group are bonded to adjacent carbon atoms of R2 or R2 is an organic group of valency from 2 to 6 having at least 2 carbon atoms, and the hydroxyl group and the amide group bonded to R2 are in positions capable of forming an oxazole ring, R3 is selected from the group consisting of a single hydrogen atom and a monovalent organic group with from 1 to 10 carbon atoms, n is an integer of value from 3 to 100,000, m is 1 or 2, p and q are integers of value from 0 to 4, p+q>0, the absorbance of said polymer at 365 nm is no more than 0.1 per 1 &mgr;m of film thickness, and wherein said polymer comprises structural units according to general formula (1) where R3 is a single hydrogen atom and structural units according to general formula (1) where R3 is a monovalent organic group having from 1 to 10 carbon atoms, such that the total carboxyl groups contained in said polymer is from 0.02 to 2.0 mmol/g.