Fluorinated compound, and fluoropolymer, process for its...

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymers from only ethylenic monomers or processes of...

Reexamination Certificate

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C430S270100, C430S914000, C430S945000, C526S242000

Reexamination Certificate

active

07550545

ABSTRACT:
To provide a fluoropolymer having functional groups and having high transparency in a wide wavelength region, and a resist composition comprising the fluoropolymer.A fluoropolymer (A) having monomer units formed by polymerization of a fluorinated diene represented by the following formula (1):in-line-formulae description="In-line Formulae" end="lead"?CF2═CFCH2CH-Q-CH2CH═CH2  (1)in-line-formulae description="In-line Formulae" end="tail"?wherein Q is (CH2)aC(CF3)2OR4(wherein a is an integer of from 0 to 3, R4is an alkyl group or a fluorinated alkyl group having at most 20 carbon atoms which may have an etheric oxygen atom, an alkoxycarbonyl group having at most 6 carbon atoms, or CH2R5(wherein R5is an alkoxycarbonyl group having at most 6 carbon atoms)), or (CH2)dCOOR6(wherein d is 0 or 1, and R6is a hydrogen atom, or an alkyl group or a fluorinated alkyl group having at most 20 carbon atoms), a process for its production and a resist composition having the fluoropolymer (A) as a base.

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