Patent ID: 8158324

Claim:
A positive-type photosensitive resin composition, comprising: (a) a novolac resin which comprises a cresol novolac resin having a molar ratio of m-cresol residues to p—cresol residues (m/p) of at least 1.8; (b) a polymer comprising, as a main component, a structure represented by formula (1) below and/or a structure represented by, formula (2) below: (wherein in formulae (1) and (2), R 1 and R 2 may be the same or different and each represent an organic group having at least two carbon atoms and a valence of 2 to 8, R 3 and R 4 may be the same or different and each represent hydrogen or a monovalent organic group of 1 to 20 carbon atoms, —NH—R 5 in formula (1) and —CO—R 6 in formula (2) each represent a polymer end group, R 5 and R 6 each represent a monovalent organic group having 2 to 30 carbon atoms which includes an unsaturated hydrocarbon group, n is in the range of 10 to 100,000, l and m each represent an integer of 0 to 2, and p and q each represent an integer of 0 to 4, provided that p+q>0); (c) a quinone diazide compound; (d) an alkoxymethyl group-containing compound; and (e) a solvent.