Patent ID: 7198880

Claim:
A positive resist composition comprising: (A1) a resin containing at least one type of repeating unit represented by the following formula (I) or (II) and additionally containing at least one type of repeating unit represented by the following formulas (IA) to (VIA), which increases the solubility in an alkali developing solution by the action of an acid, and (B) a compound which is capable of generating an acid by irradiation of actinic ray or radiation: wherein R x1 and R y1 each independently represents a hydrogen atom, a halogen atom, a cyano group, or an alkyl group which may optionally have a substituent, L 1 represents a divalent binding group, m 1 represents 0, m 2 represents 0 or 1, R a1 and R b1 represents an alkyl group which may optionally have a substituent, an aryl group which may optionally have a substituent, or an aralkyl group which may optionally have a substituent, Q 1 represents an alicyclic hydrocarbon group, Rb′ represents a hydrogen atom, an organic group or a halogen atom, l represents an integer of 0 to 3, L 2 represents single bond or a divalent binding group): wherein R 1 and R 2 represent a hydrogen atom, a halogen atom, a cyano group or a trifluoromethyl group, X represents a group decomposable by the action of an acid, R 3a and R 4a represent a group decomposable by the action of an acid, R 11 , to R 16 , R 21 to R 32 , R 41 to R 46 , and R 51 to R 56 each independently represents a hydrogen atom, a fluorine atom, or an alkyl group which may optionally have a substituent, provided that at least one of R 11 to R 16 , at least one of R 21 to R 32 , at least one of R 41 to R 46 , or at least one of R 51 to R 56 is a fluorine atom, n represents an integer of 1 to 5.