Patent ID: 6939662

Claim:
A positive-working resist composition comprising: (A2) a resin containing a repeating unit represented by the following formula (Ia), and at least one selected from the group consisting of repeating units represented by the following formulae (II) to (IV), which increases the solubility in an alkali developing solution by the action of an acid, and (B) a compound capable of generating an acid upon irradiation with one of actinic rays and radiation: wherein Ra, Rb and Rc each independently represents a hydrogen atom, a fluorine atom or a fluoroalkyl group, L 1 represents a single bond or a divalent connecting group, R 1 to R 6 each independently represents a hydrogen atom, a fluorine atom or a fluoroalkyl group, with the proviso that at least one of R 1 to R 6 is not a hydrogen atom, X represents a hydrogen atom or a group capable of decomposing by the action of an acid, n represents 0 or 1, Q represents a hydrogen atom or a hydroxyl group: wherein R 11 to R 16 each independently represents a hydrogen atom, a fluorine atom or a fluoroalkyl group, with the proviso that ay least one of R 11 to R 16 is not a hydrogen atom, X 1 represents a hydrogen atom or a group capable of decomposing by the action of an acid, m represents 0 or 1: wherein R 3a represents a hydrogen atom or a group capable of decomposing by the action of an acid, m represents 0 or 1: wherein R1a represents a hydrogen atom, a fluorine atom, a chlorine atom, a bromine atom, a cyano group or a trifluoromethyl group, R41 to R 46 each independently represents a hydrogen atom, a fluorine atom or a fluoroalkyl group, with the proviso that at least one of R 41 to R 46 is not a hydrogen atom, X 2 represents a hydrogen atom or a group capable of decomposing by the action of an acid, na' represents an integer of from 1 to 5, with the proviso that when n is 2 or greater, the two or more R 41 's to R 46 's and X 2 's may be the same or different.