Patent ID: 7977243

Claim:
A production method for a barrier film, comprising: accommodating a substrate and a metallic etched member provided at a position opposed to the substrate into a chamber; exhausting an inner atmosphere of the chamber; supplying a source gas containing a halogen into the chamber and generating a source gas plasma so that the etched member is etched with the source gas plasma to form a precursor derivated from a metal component contained in the etched member and the source gas; supplying a gas containing nitrogen into the chamber and generating a nitrogen-containing gas plasma so that a metal nitride is formed upon reaction between nitrogen and the precursor; maintaining the substrate at a predetermined temperature to deposit the metal nitride as a barrier film on a surface of the substrate; and then supplying a rare gas to site above the surface of the substrate and generating a rare gas plasma, thereby nitrogen atoms in a superficial layer of the metal nitride film are removed by the rare gas plasma to decrease a nitrogen content of the superficial layer relative to an interior of a matrix of the metal nitride film.