Patent ID: 7129020

Claim:
A liquid coating composition for forming an antireflective film overlaid on top of a photoresist layer that contains a polymer, the polymer containing, as a structural unit, a (meth)acrylate unit that has at least one polycyclic hydrocarbon group on its side chain and becomes more soluble to alkali by the action of an acid, the liquid coating composition consisting essentially of: (a) a water-soluble, film-forming component; (b) at least one fluorine-based compound selected from the group consisting of a perfluoroalkylcarboxylic acid having 4 or more carbon atoms and a perfluoroalkylsulfonic acid having 5 or more carbon atoms; and (c): (c-1) at least one member selected from the group consisting of nonafluorobutanesulfonic acid and hexafluoropropanedisulfonic acid and/or (c-2) tris (trifluoromethylsulfonyl) methane.