Patent ID: 6087063
Filing Date: 2000-07-11
Classification: G03F,Y10S

Abstract:
A positive-working photoresist composition in the form of a uniform solution in an organic solvent which comprises:(A) 100 parts by weight of an acrylic resin which is subject to a change in the solubility in an aqueous alkaline solution in the presence of an acid; and(B) from 0.5 to 30 parts by weight of an acid-generating compound capable of releasing an acid when irradiated with actinic rays,the acrylic resin as the component (A) comprising monomeric units represented by the general formula.brket open-st.CH.sub.2 --CR.sup.1 (--CO--O--CR.sup.2 R.sup.3 R.sup.4).brket close-st.,in which R.sup.1 is a hydrogen atom or a methyl group, R.sup.2 and R.sup.3 are each, independently from the other, an alkyl group having 1 to 4 carbon atoms and R.sup.4 is an alkoxycarbonyl group or a group derived from a molecule of a lactone compound or ketone compound by removing a hydrogen atom bonded to the carbon atom, the molar fraction of the monomeric units of the general formula given above being from 20% to 80%.