Patent ID: 6790586
Filing Date: 2004-09-14
Classification: G03F,Y10S

Abstract:
A resist composition adapted for exposure to high-energy radiation having a wavelength below 180 nm, comprising(A) a base resin in the form of a polymer comprising recurring units of the following formula (1), (2) or (3): wherein R1 is methylene, oxygen or sulfur, R2 is a straight, branched or cyclic alkylene group of 1 to 20 carbon atoms which may contain a oxygen, nitrogen or sulfur hetero atom to form a hydroxy, alkoxy, acetyl or ester group, R3 is a fluorinated acid labile group of the following formula (4), â€œaâ€  is 0 or 1, and â€œbâ€  is 1 or 2, wherein R4, R5, R6 and R7 each are hydrogen, fluorine, or a straight, branched or cyclic alkyl or fluorinated alkyl group of 1 to 20 carbon atoms, and at least one of R4, R5, R6 and R7 contains fluorine,(B) a photoacid generator, and (C) an organic solvent.