Patent ID: 7592126
Filing Date: 2009-09-22
Classification: G03F,Y10S

Abstract:
1. A positive resist composition comprising: (A) a resin insoluble or sparingly soluble in an alkali but capable of decomposing under an action of an acid to increase a solubility in an alkali developer, the resin having a β-(meth)acroyloxy-γ-butyrolactone repeating unit represented by the following formula (1) containing a lactone ring which may have a substituent; and (B) a compound capable of generating an organic acid represented by the following formula (2), (3), (3′), (4) or (5) upon irradiation of actinic rays or radiation: wherein R 1 represents a hydrogen atom or an alkyl group, and the lactone ring may have a substituent; wherein Rf represents an organic group having a fluorine atom, R represents a hydroxyl group or an organic group, Ar represents an aromatic group, l represents an integer of 1 to 6, m represents an integer of 0 to 4, and n represents an integer of 0 to 4, provided that m+n represents an integer of 1 or more; wherein A A Rx represents a hydrogen atom, an aryl group, an alkyl group or a cycloalkyl group, A Ra represents a hydrogen atom or an organic group, p represents 2 or 3, Rb represents a p-valent linking group, and when A wherein Y represents an alkylene group substituted by at least one fluorine atom, and Rc represents an alkyl group or a cycloalkyl group.