Patent ID: 8119518

Claim:
A method of fabricating a semiconductor device, comprising the steps of: depositing a fluorine-doped carbon film on a substrate by a plasma CVD process that uses a rare gas and a source gas that contains C and F in a molecule thereof; forming an opening in said fluorine-doped carbon film by a dry etching process; depositing a first metal film so as to cover a sidewall surface and a bottom surface of said opening, wherein there is provided, after said step of forming said opening but before said step of depositing said first metal film, a step of depositing a second metal film that forms a stable metal fluoride when reacted with fluorine from the fluorine-doped carbon film, such that said second metal film covers at least said sidewall surface and said bottom surface of said opening; and forming the stable metal fluoride on a part of the second metal film where said second metal film and said fluorine-doped carbon film contact each other, wherein said fluorine-doped carbon film substantially does not contain hydrogen, and wherein said source gas does not contain hydrogen.