Patent ID: 7314691

Claim:
A method of forming a mask pattern for semiconductor device fabrication, which comprises: forming a resist film on a substrate; exposing and developing the resist film to form a resist pattern on the substrate; forming an interpolymer complex film having a network formed by a hydrogen bond between a proton donor polymer and a proton acceptor polymer on a surface of the resist pattern; preparing a coating composition comprising the proton donor polymer and the proton acceptor polymer; and contacting the coating composition with the surface of the resist pattern to form the interpolymer complex film on the surface of the resist pattern, wherein the proton acceptor polymer comprises a first repeat unit, wherein the first repeat unit includes a monomer unit having an amido group, and wherein the proton donor polymer comprises a first repeat unit, wherein the first repeat unit is a maleic acid monomer unit having a carboxyl group or a sulfonic group.