Patent ID: 6638683
Filing Date: 2003-10-28
Classification: G03F,Y10S

Abstract:
A positive photoresist composition comprising:(a) Resin A obtained from an alkali-soluble resin containing phenolic hydroxyl groups by replacing from 10 to 80% of the phenolic hydroxyl groups each with a group represented by formula (I); (b) Resin B obtained from an alkali-soluble resin containing phenolic hydroxyl groups by replacing from 10 to 80% of the phenolic hydroxyl groups each with a group represented by formula (II) or (III); (c) a compound which generates an acid upon irradiation with actinic rays or a radiation; and (d) a solvent, â€ƒwherein R1 represents a substituent selected from alkyl groups having 1 to 4 carbon atoms; W represents either an organic residue containing at least one atom selected from oxygen, nitrogen, sulfur, phosphorus, and silicon atoms or an atomic group selected from the group consisting of an amino group, an ammonium group, and a mercapto group; n represents a natural number of from 1 to 4; and R4 represents a linear, branched, or cyclic alkyl group having 1 to 6 carbon atoms.