Patent ID: 7632626

Claim:
An anti-reflective coating forming composition for lithography comprising: a polymer having a repeating structural unit of formula (1) or (2): wherein R 1 and R 2 independently of each other are hydrogen atom, methyl, ethyl or halogen atom, A 1 , A 2 , A 3 , A 4 , A 5 , A 6 and A 6 independently of one another are hydrogen atom, methyl or ethyl, Q is a group of formula (3) or (4): wherein Q 1 is C 1-15 alkylene, phenylene, naphthylene or anthrylene, and the phenylene, naphthylene and anthrylene may be substituted by a substituent selected from the group consisting of C 1-6 alkyl, halogen atom, C 1-6 alkoxy, nitro, cyano, hydroxy and C 1-6 alkylthio, n 1 and n 2 independently of each other are a number of 0 or 1, X 1 is a group of formula (5), (6) or (7) wherein R 3 and R 4 independently of each other are hydrogen atom, C 1-6 alkyl, C 3-6 alkenyl, benzyl or phenyl, and the phenyl may be substituted by a substituent selected from the group consisting of C 1-6 alkyl, halogen atom, C 1-6 alkoxy, nitro, cyano, hydroxy and C 1-6 alkylthio, or R 3 and R 4 together may form C 3-6 ring, R 5 is C 1-6 alkyl, C 3-6 alkenyl, benzyl or phenyl, and the phenyl may be substituted by a substituent selected from the group consisting of C 1-6 alkyl, halogen atom, C 1-6 alkoxy, nitro, cyano, hydroxy and C 1-6 alkylthio, and a solvent.