Polymer compound, resist material and pattern formation method

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Reexamination Certificate

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C430S325000, C430S326000, C430S311000, C430S905000, C430S907000, C430S914000, C430S945000, C430S966000, C526S288000

Reexamination Certificate

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10954374

ABSTRACT:
The base polymer of a resist material contains a polymer compound including a first unit represented by a general formula of the following Chemical Formula 4 and a second unit represented by a general formula of the following Chemical Formula 5:wherein R1, R2and R3are the same or different and are a hydrogen atom, a fluorine atom, or a straight-chain alkyl group, a branched or cyclic alkyl group or a fluoridated alkyl group with a carbon number not less than 1 and not more than 20; R4is a straight-chain alkylene group or a branched or cyclic alkylene group with a carbon number not less than 0 and not more than 20; R5and R6are the same or different and are a hydrogen atom, a straight-chain alkyl group, a branched or cyclic alkyl group or a fluoridated alkyl group with a carbon number not less than 1 and not more than 20, or a protecting group released by an acid; R7is a methylene group, an oxygen atom, a sulfur atom or —SO2—; R8, R9, R10and R11are the same or different and are a hydrogen atom, a fluorine atom, a hydroxyl group, —OR13, CO2R13, —R2—OR13or —R12—CO2R13, at least one of R8, R9, R10and R11including —OR13, —CO2R13, —R12—OR13or —R12—CO2R13(wherein R 2 is a straight-chain alkylene group, a branched or cyclic alkylene group or a fluoridated alkylene group with a carbon number not less than 1 and not more than 20 and R13is a hydrogen atom, a straight-chain alkyl group, a branched or cyclic alkyl group or a fluoridated alkyl group with a carbon number not less than 1 and not more than 20, or a protecting group released by an acid); 0<a<1; 0<b<1; and c is 0 or 1.

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