Patent ID: 6632581
Filing Date: 2003-10-14
Classification: G03F,Y10S

Abstract:
A chemically amplified positive resist composition which comprises a resin (X) which is insoluble or slightly soluble in alkali but becomes soluble in alkali by the action of acid, and has a polymeric unit (a) derived from an alicyclic unsaturated carboxylic acid ester in which a carboxylic acid ester group represented by the formula (I): wherein R1 represents an alkyl having 1 to 4 carbon atoms, R represents an alicyclic hydrocarbon residue which may be optionally substituted with a group selected from hydroxyl and oxo, and R2 represents an alkyl having 1 to 4 carbon atoms, is bonded to an alicyclic hydrocarbon having a polymerizable carbon-carbon double bond in its ring backbone structure; and a polymeric unit (b) derived from maleic anhydride; and an acid-generating agent (Y).