Patent ID: 6319654
Filing Date: 2001-11-20
Classification: G03F,Y10S

Abstract:
A process for forming a photoresist pattern comprising the steps of:(a) preparing a chemical amplification photoresist composition comprising a cross-linker, a photoacid generator and a photoresist polymer in a solvent;(b) coating the photoresist composition on a substrate of a semiconductor element to form a photoresist film;(c) exposing the photoresist film to light;(d) performing a silylation process on the photoresist film to form a silicon oxide film pattern on the surface of the exposed photoresist film;(e) developing the photoresist film to form a pattern thereon; and(f) etching the substrate using the silicon oxide film pattern as an etching mask;wherein the cross-linker contained in the photoresist composition comprises at least one compound selected from the group consisting of monomers represented by the following Chemical Formulas 1 and 2 and polymers thereof: ##STR26##wherein, R.sub.1 and R.sub.2 individually represent straight or branched C.sub.1-10 alkyl, straight or branched C.sub.1-10 ester, straight or branched C.sub.1-10 ketone, straight or branched C.sub.1-10 carboxylic acid, straight or branched C.sub.1-10 acetal, straight or branched C.sub.1-10 alkyl including at least one hydroxyl group, straight or branched C.sub.1-10 ester including at least one hydroxyl group, straight or branched C.sub.1-10 ketone including at least one hydroxyl group, straight or branched C.sub.1-10 carboxylic acid including at least one hydroxyl group, and straight or branched C.sub.1-10 acetal including at least one hydroxyl group; and R.sub.3 represents hydrogen or methyl; ##STR27##wherein,R represents straight or branched C.sub.1-10 alkylene optionally comprising a functional group selected from the group consisting of an ester, ketone, carboxylic acid, acetal, hydroxyl, and combinations thereof;each of R.sub.5 and R.sub.6 is independently hydrogen, straight or branched C.sub.1-10 alkyl, straight or branched C.sub.1-10 ester, straight or branched C.sub.1-10 ketone, straight or branched C.sub.1-10 carboxylic acid, straight or branched C.sub.1-10 acetal, straight or branched C.sub.1-10 alkyl including at least one hydroxyl group, straight or branched C.sub.1-10 ester including at least one hydroxyl group, straight or branched C.sub.1-10 ketone including at least one hydroxyl group, straight or branched C.sub.1-10 carboxylic acid including at least one hydroxyl group, and straight or branched C.sub.1-10 acetal including at least one hydroxyl group;R.sub.7 represents hydrogen or methyl;m represents 0 or 1; andn represents a number of 1 to 5.