Patent ID: 7871751

Claim:
A radiation-sensitive composition containing a resist compound A, an acid generator B, and an acid crosslinking agent C, wherein: the resist compound A is a polyphenol compound which is produced by the condensation of (i) a C 5-45 aromatic ketone or aromatic aldehyde, having a conjugated structure which is formed by at least two benzene rings and/or a nonbonding electron pair of hetero atom, with (ii) a C 6-15 compound having from 1 to 3 phenolic hydroxyl groups but not having the conjugated structure, and has a molecular weight of from 300 to 5000; and the acid generator B directly or indirectly generates an acid upon the irradiation of a radiation selected from the group consisting of visible lights, ultraviolet rays, excimer lasers, electron beams, extreme ultraviolet rays (EUV), X-rays and ion beams.