Patent ID: 6743565
Filing Date: 2004-06-01
Classification: G03F,Y10S

Abstract:
A positive resist composition comprising (A) a resin containing at least one repeating unit represented by the following formula (I) and at least one repeating unit represented by formula (VII), which decomposes under the action of an acid to increase the solubility in an alkali developer, and (B) a compound capable of generating an acid upon irradiation with actinic rays or radiation: wherein R1 represents a hydrogen atom, a halogen atom, a cyano group, an alkyl group which may have a substituent, or a haloalkyl group which may have a substituent; R2 and R3, which may be the same or different, each represents a hydrogen atom, a hydroxyl group, a halogen atom, a cyano group, an alkoxy group, an acyl group, an alkyl group which may have a substituent, a cycloalkyl group which may have a substituent, an alkenyl group which may have a substituent, an aralkyl group which may have a substituent, or an aryl group which may have a substituent; and R4 represents a hydrogen atom, an alkyl group which may have a substituent, a perfluoroalkyl group which may have a substituent, a cycloalkyl group which may have a substituent, an acyl group which may have a substituent, an alkoxycarbonyl group which may have a substituent, an alkoxycarbonylmethyl group which may have a substituent, or a group represented by formula (II) which may have a substituent: wherein R5 and R6, which may be the same or different, each represents a hydrogen atom, an alkyl group which may have a substituent, or a cycloalkyl group which may have a substituent; R7 represents an alkyl group which may have a substituent, a perfluoroalkyl group which may have a substituent, a cycloalkyl group which may have a substituent, a perfluorocycloalkyl group which may have a substituent, an aralkyl group which may have a substituent, or an aryl group which may have a substituent; and two of R5 to R7 may combine to form a ring; wherein R1 represents a hydrogen atom, a halogen atom, a cyano group, an alkyl group which may have a substituent, or a haloalkyl group which may have a substituent; R2 and R3, which may be the same or different, each represents a hydrogen atom, a hydroxyl group, a halogen atom, a cyano group, an alkoxy group, an acyl group, an alkyl group which may have a substituent, a cycloalkyl group which may have a substituent, an alkenyl group which may have a substituent, an aralkyl group which may have a substituent, or an aryl group which may have a substituent; R19 and R20, which may be the same or different, each represents an alkyl group which may have a substituent, a monocyclic or polycyclic cycloalkyl group which may have a substituent, an alkenyl group which may have a substituent, an aralkyl group which may have a substituent, or an aryl group which may have a substituent; W represents a divalent linking group; X represents a single bond, an oxygen atom, a sulfur atom, a selenium atom, or a group selected from the group consisting of â€”COâ€”, â€”CO2â€”, â€”OCOâ€”, â€”SOâ€” and â€”SO2â€”; and R22 represents a monovalent hydrocarbon group having from 1 to 30 carbon atoms, which may have a heteroatom.