Patent ID: 6824955
Filing Date: 2004-11-30
Classification: G03F,Y10S

Abstract:
A polymer comprising recurring units of the following general formulae (1a) and (1b) and having a weight average molecular weight of 1,000 to 500,000, wherein R1 and R2 each are hydrogen, a fluorine atom or a straight, branched or cyclic alkyl or fluorinated alkyl group of 1 to 20 carbon atoms,R3 is a fluorine atom or a straight, branched or cyclic fluorinated alkyl group of 1 to 20 carbon atoms, R4 is an acid labile group, an adhesive group or a straight, branched or cyclic fluorinated alkyl group of 1 to 20 carbon atoms, R5 is an oxygen or sulfur atom, R6a, R6b, R6c and R6d are each independently hydrogen, a hydroxyl group, â€”(CH2)dC(R7)2(OR8), â€”(CH2)dCO2R8, or a straight, branched or cyclic alkyl or fluorinated alkyl group of 1 to 20 carbon atoms which may contain oxygen in the form of a hydroxyl group or ether bond in a substituent group, R7 is hydrogen, a fluorine atom or a straight, branched or cyclic fluorinated alkyl group of 1 to 20 carbon atoms, R8 is hydrogen, an acid labile group, an adhesive group, or a straight, branched or cyclic fluorinated alkyl group of 1 to 20 carbon atoms, letters a and b each are a number from more than 0 to less than 1, and 0