Patent ID: 6294630
Filing Date: 2001-09-25
Classification: C08F,G03F

Abstract:
A polymer used in a chemically amplified resist and represented by the following formula: ##STR9##wherein R.sub.1, R.sub.3 and R.sub.5 are each independently selected from the group consisting of --H and --CH.sub.3 ; R.sub.2 is selected from the group consisting of t-butyl, tetrahydropyranyl and 1-alkoxyethyl; R.sub.4 is selected from the group consisting of --H, --CH.sub.3, t-butyl, tetrahydropyranyl and 1-alkoxyethyl; x is an integer ranging from 1 to 4; and wherein l, m, and n are selected such that l/(l+m+n) ranges from 0.1 to 0.5, m/(l+m+n) ranges from 0.01 to 0.5, and (l+m)/(l+m+n) ranges from 0.1 to 0.7.