Patent ID: 6835524
Filing Date: 2004-12-28
Classification: C08F,G03F,Y10S

Abstract:
A polymer comprising:recurring units of an acrylic derivative having a fluorinated backbone of at least one of formulae (1-1) to (1-6), (1-9), (1-11), (1-13) to (1-15) and (1-17) to 1-29): wherein R1, R2 and R3 are independently hydrogen, fluorine or unsubstituted or fluorinated, straight, branched or cyclic alkyl groups of 1 to 20 carbon atoms, at least one of R1, R2 and R3 contains fluorine, andrecurring units of the formula (2): wherein R5, R6 and R7 are independently hydrogen, fluorine or unsubstituted or fluorinated, straight, branched or cyclic alkyl groups of 1 to 20 carbon atoms, and R8 is an acid labile group selected from oxoalkyl groups of 4 to 20 carbon atoms and groups of the following formulae (4) to (6): whereinR13 is a tertiary alkyl group of 4 to 20 carbon atoms, a trialkylsilyl group whose alkyl groups each have 1 to 6 carbon atoms, an oxoalkyl group of 4 to 20 carbon atoms or a group of formula (6), letter â€œaâ€  is an integer of 0 to 6, R14 and R15 are independently hydrogen or straight, branched or cyclic alkyl groups of 1 to 18 carbon atoms, R16 is a monovalent hydrocarbon group of 1 to 18 carbon atoms which may have an oxygen atom, alternatively, a pair of R14 and R15, a pair of R14 and R16, or a pair of R15 and R16, taken together, form a ring, by providing a straight or branched alkylene group of 1 to 18 carbon atoms, R17, R18 and R19 are independently straight, branched or cyclic alkyl groups of 1 to 20 carbon atoms, which optionally contain a hetero atom selected from oxygen, sulfur or nitrogen, and alternatively, a pair of R17 and R18, a pair of R17 and R19, or a pair of R18 and R19, taken together, form a ring, by providing a straight or branched alkylene group of 3 to 20 carbon atoms.