Patent ID: 6589705
Filing Date: 2003-07-08
Classification: G03F

Abstract:
A positive-working photoresist composition comprising (A) a resin comprising a repeating structural unit represented by the following general formula (I) and a repeating structural unit represented by at least one of the following general formulae (IIa) and (IIb) which resin increases in its solubility in an alkaline developer when acted upon by an acid, (Bâ€²) an onium salt compound which generates an acid when irradiated with active ray or radiation and (C) at least one surface active agent selected from the group consisting of a nonionic surface active agent, a fluorine-based surface active agent, a silicon based surface active agent and a surface active agent containing at least one fluorine atom and at least one silicon atom: wherein R1 to R3 each independently represents an alkyl group, haloalkyl group, halogen atom, alkoxy group, trialkylsilyl group or trialkylsilyloxy group; and n represents an integer of 0 or 1; wherein Y represents a group selected from the group consisting of hydrogen atom, methyl group, cyano group and chlorine atom; L represents a single bond or divalent connecting group; and Q represents a tertiary alkyl group having 5 to 20 carbon atoms, alkoxymethyl group, alkoxyethyl group or isobornyl group; wherein X1 and X2 each independently represents a group selected from the group consisting of oxygen atom, sulfur atom, â€”NHâ€” and â€”NHSO2â€”; L1 and L2 each independently represents a single bond or divalent connecting group; A1 represents â€”Q or â€”COOQ, with the proviso that when X1 is an oxygen atom and L1 is a single bond, A1 represents â€”Q; A2 represents a hydrogen atom, cyano group, hydroxyl group, â€”COOH, â€”COORâ€², â€”COâ€”NHâ€”Râ€³, alkyl group which may be substituted, cyclic hydrocarbon group which may be substituted, alkoxy group, â€”Q or â€”COOQ in which Râ€² and Râ€³ each independently represents an alkyl group which may have a substituent; and Q represents a tertiary alkyl group having 5 to 20 carbon atoms, alkoxymethyl group, alkoxyethyl group or isobornyl group.