Patent ID: 6479210
Filing Date: 2002-11-12
Classification: G03F,Y10S

Abstract:
A chemically amplified resist composition comprising an organic material having a substituent consisting of one species of acid labile group, and a compound capable of generating an acid upon exposure with radiation, wherein the compound capable of generating an acid upon exposure with radiation comprises at least one onium salt compound and at least one sulfone compound and/or sulfonate compound, further wherein the organic material is a reaction product of an alkaline soluble polymer and one compound which gives an acid decomposable group, where the alkali soluble polymer consists of a repeat unit of formula 1 or consists of a copolymer with repeat units of formula 1 and formula 2, where, R1 represents hydrogen or alkyl, R2 represents alkyl, R3 represents hydrogen or alkyl, and m is 0 or 1-4, further where the sulfonate compound is at least one selected from among nitrobenzyl sulfonates, alkyl sulfonates, aryl sulfonates, benzoin sulfonates, sulfonic acid esters, pyrogallol tristriflate and benzoin tosylate, and further where the onium salt is selected from an iodonium salt, triphenyl sulfonium salt, (methylphenyl) diphenyl sulfonium salt, bis(methylphenyl) phenyl sulfonium salt, tris(methylphenyl) sulfonium salt, t-butylphenyl diphenyl sulfonium salt, tris(t-butylphenyl) sulfonium salt, methoxyphenyl sulfonium salt, mesityl diphenyl solonium salt, chloromethylphenyl diphenyl sulfonium salt, bis(chloromethylphenyl) phenyl sulfonium salt and tris(chloromethylphenyl) sulfonium salt.