Patent ID: 6713229
Filing Date: 2004-03-30
Classification: C08F,G03F,Y10S

Abstract:
A terpolymer for use in a chemically amplified resist, the terpolymer having the following formula: wherein R3 is hydrogen or a first aliphatic hydrocarbon; wherein R4 is hydrogen or a second aliphatic hydrocarbon; wherein R5 is hydrogen or methyl; wherein R6 comprises a acid-labile group selected from the group consisting of a tertiary-alkyl group, an acetal g up, a ketal group and a tertiary-alicyclic group; wherein n comprises an integer; wherein m comprises an integer; wherein the result of n/(n+m) ranges from around 0.1 to around 0.5; and wherein at least one of R3 and R4 is not hydrogen.