Patent ID: 8124523

Claim:
A method for fabricating a semiconductor device, comprising the steps of: (a) forming an internal insulation film comprising a fluorine-doped carbon film on a substrate using a plasma formed by a gas having carbon and fluorine; (b) forming a metal film on the internal insulation film; (c) etching the metal film to form a hard mask; (d) forming a concave part in the fluorine-doped carbon film by etching the fluorine-doped carbon film using the hard mask; (e) forming a film of a wiring material on the substrate for filling the concave part with the wiring material; (f) removing an excess part of the wiring material and the hard mask on the fluorine-doped carbon film for exposing a surface of the fluorine-doped carbon film; and (g) removing an oxide formed on the surface of the fluorine-doped film.