Patent ID: 6777160
Filing Date: 2004-08-17
Classification: G03F,Y10S

Abstract:
A positive-working resist composition comprising (A) a resin which has an aliphatic cyclic hydrocarbon group and enhances in the dissolution rate in an alkaline developing solution by an action of an acid, and (B) a compound generating an acid by irradiation of actinic ray or radiation, wherein the resin of (A) is a resin having repeating structural units represented by formula (I), repeating structural units represented by formula (II) and repeating structural units represented by formula (III), and (B) is a compound represented by the following formula (Ia) or (IIb): wherein R11â€² and R12â€² each independently represents a hydrogen atom, a cyano group, a halogen atom or an alkyl group; and Zâ€² represents an atomic group for forming an alicyclic structure which contains two combined carbon atoms (Câ€”C) and may have a substituent group; wherein Z2 represents â€”Oâ€” or â€”N(R41)â€”, wherein R41 represents a hydrogen atom, a hydroxyl group, an alkyl group, a haloalkyl group or â€”OSO2â€”R42, R42 represents an alkyl group, a haloalkyl group, a cycloalkyl group or a camphor residue; wherein R91 represents a hydrogen atom, a lower alkyl group, a halogen atom or â€”CN; X5 represents â€”Oâ€”, â€”Sâ€”, â€”NR93â€” or NR93SO2â€”, wherein R93 represents a hydrogen atom or a chain or cyclic alkyl group; B represents a single bond or a connecting group, and R92 represents a hydrogen atom, a chain or cyclic alkyl group, an alkoxyl group, a hydroxyl group, a carboxyl group, a cyano group, â€”COOR94 or a group represented by any one of formulas (IV) to (X), wherein R94 represents a hydrogen atom or a chain or cyclic alkyl group: â€ƒâ€”N+(R95)(R96)(R97)Â·Xâˆ’â€ƒâ€ƒ(VII)â€”R98â€”A50â€”R99â€ƒâ€ƒ(IX) â€”SO3R100â€ƒâ€ƒ(X) in formula (IV), Ra1, Rb1, Rc1, Rd1 and Re1 each independently represents a hydrogen atom or an alkyl group having from 1 to 4 carbon atoms; and m and n each independently represents an integer of from 0 to 3, and m+n is from 2 to 6; in formulas (V-1) to (V-4), R1b to R5b each independently represents a hydrogen atom, an alkyl group, a cycloalkyl group or an alkenyl group, and two of R1b to R5b may combine with each other to form a ring; in formula (VII), R1d to R8d each independently represents a hydrogen atom or an alkyl group; Rd0 represents a hydrogen atom, a chain or cyclic alkyl group, an aryl group or an aralkyl group; and m represents an integer of from 1 to 10; in formula (VIII), R95 to R97 each independently represents a hydrogen atom, a chain or cyclic alkyl group, an alkenyl group, an aryl group or an aralkyl group, with the proviso that R95 to R97 may combine with each other to form a non-aromatic or aromatic ring; and Xâˆ’ represents Râ€”SO3âˆ’, wherein R represents an aliphatic hydrocarbon group or an aromatic hydrocarbon group; in formula (IX), R98 represents a single bond, an alkylene group, an arylene group or a divalent group which is a combination thereof; A50 represents any one of the following functional groups: and R99 represents a hydrogen atom or an alkyl group; in formula (X), R100 represents a chain or cyclic alkyl group, an aryl group or an aralkyl group; wherein R1 to R5 each independently represents an aliphatic or aromatic hydrocarbon group which may have a substituent group, with the proviso that two of R1 to R3 may combine with each other to form a ring, and that R4 and R5 may combine with each other to form a ring; and Xâˆ’ represents any one of the following anions:Xâˆ’; R6â€”SO2â€”{overscore (N)}â€”SO2â€”R7 wherein R6 to R10 each independently represents an aliphatic hydrocarbon group which may have a substituent group, with the proviso that R6 and R7 may combine with each other to form a ring, and that two of R8 to R10 may combine with each other to form a ring.