Patent ID: 7449573
Filing Date: 2008-11-11
Classification: C07C,G03F,Y10S

Abstract:
1. A photosensitive compound which, upon irradiation with one of KrF excimer laser light, ArF excimer laser light, electron beam and EUV light, generates an acid represented by one of formulae (IA), (IB), (IC) and (I′): wherein A A Rx and Rx′ each independently represents a hydrogen atom, an aryl group, an alkyl group, or a cycloalkyl group; A A Ra′ represents an organic group, provided that Ra′ and Rx′ in formula (IA) are bonded to each other to form a ring; Ra″ represents an alkyl group, an aryl group, an aralkyl group, or an alkenyl group, provided that Ra″ in formula (IB) represents an aryl group having a substituent; n represents 2 or 3; n1 represents an integer of 1 to 10; n2 represents an integer of 0 to 10; Rb represents a connecting group having a valence of n; and when A