Patent ID: 6670094
Filing Date: 2003-12-30
Classification: G03F,Y10S

Abstract:
A polymer comprising recurring units of the following general formula (1-1) or (1-2) and having a weight average molecular weight of 1,000 to 500,000, wherein R1 and R2 each are hydrogen or a straight, branched or cyclic alkyl group of 1 to 15 carbon atoms, R1 and R21, taken together, may form a ring, wherein the combination of R1 with R2 is a straight, branched or cyclic alkylene group of 2 to 15 carbon atoms, R3 is hydrogen, a straight, branched or cyclic alkyl, acyl or alkylsulfonyl group of 1 to 15 carbon atoms or a straight, branched or cyclic alkoxycarbonyl or alkoxyalkyl group of 2 to 15 carbon atoms, in which some or all of the hydrogen atoms on constituent carbon atoms may be substituted with halogen atoms, with the case that all R1, R2 and R3 are hydrogen being excluded, and k is 0 or 1.