Patent ID: 11820735

Abstract:
Described are a salt and a resist composition capable of producing a resist pattern with satisfactory line edge roughness (LER). The salt is represented by formula (I): In formula (I), R1, R2, R3, R4 and R5 each independently represent a halogen atom or a perfluoroalkyl group having 1 to 6 carbon atoms, R6, R7 and R8 each independently represent a halogen atom, a hydroxy group, a fluorinated alkyl group having 1 to 6 carbon atoms or an alkyl group having 1 to 12 carbon atoms, and —CH2— included in the alkyl group may be replaced by —O— or —CO—, m5 represents an integer of 1 to 5, m6 represents an integer of 0 to 3, m7 represents an integer of 0 to 3, m8 represents an integer of 0 to 4, and AI− represents an organic anion.