Patent ID: 8663903
Filing Date: 2014-03-04
Classification: C08F,G03F

Abstract:
1. A pattern forming method, comprising the sequential steps of: (a) applying a top coating composition on a resist layer to form a two-layer resin film having a top coating layer on the resist layer, the top coating composition consisting essentially of a fluorine-containing polymer and an organic solvent, the fluorine-containing polymer having a first repeating unit represented by the following general formula (1), wherein R 1 represents a hydrogen atom, fluorine atom, methyl group or trifluoromethyl group, R 2 represents a heat-labile protecting group, R 3 represents a fluorine atom or fluorine-containing alkyl group, and W is a bivalent linking group, and a second repeating unit obtained by a cleavage of a polymerizable double bond of a polymerizable monomer having a hexafluoroisopropyl hydroxyl group; (b) conducting an exposure of the two-layer resin film to a high-energy ray having a wavelength of 300 nm or shorter through a photomask; (c) conducting a heating treatment on the two-layer resin film; and (d) conducting a development of the two-layer resin film by using a developing solution.