Patent ID: 6630280
Filing Date: 2003-10-07
Classification: G03F,Y10S

Abstract:
A positive photoresist composition comprising:(a) a resin having a structural unit represented by the following formula (I) and being capable of decomposing by the action of an acid to increase the solubility in an alkali developer, and (b) a compound capable of generating an acid with irradiation of actinic ray or radiation: wherein R21 represents a hydrogen atom or a methyl group, R23 represents a hydrogen atom, a halogen atom, an alkyl group, an aryl group, an alkoxy group, an acyl group or an acyloxy group, n represents an integer of from 1 to 3 and W represents a group represented by the following formula: wherein R1 represents a hydrogen atom, R2 represents a hydrogen atom or an alkyl group having from 1 to 4 carbon atoms, R3 and R4, which may be the same or different, each represents a hydrogen atom or a linear, branched or cyclic alkyl group which may have a substituent, R5 represents a linear, branched or cyclic alkyl group which may have a substituent, an aryl group which may have a substituent or an aralkyl group which may have a substituent, m represents an integer of from 1 to 20, and n represents an integer of from 0 to 5.