Patent ID: 9653301
Date: 2017-05-16
CPC Classifications: C23C,H01L

Claim:
1. A method of manufacturing a semiconductor device, the method comprising: forming an insulating film on a substrate; and forming a metal film comprising a stacked structure of a laminated film where a first metal film and a second metal film are laminated repeatedly; and a capping metal film disposed on the laminated film, the first metal film at a bottom of the metal film being disposed on the insulating film to directly contact the insulating film, the capping metal film being disposed on the second metal film at a top of the metal film to directly contact the second metal film, the second metal film having a work function greater than 4.8 eV and being different from the first metal film in material, and the capping metal film being constituted by a same material as the first metal film, wherein oxidation resistances of the first metal film and the capping metal film are greater than that of the second metal film.