Patent ID: 7053459
Filing Date: 2006-05-30
Classification: H01L

Abstract:
1. A semiconductor integrated circuit device comprising: (a) a semiconductor integrated circuit chip having a first main surface; (b) a silicon-base surface region, over the first main surface, having silicon as one of principal constituents; (c) a gate insulating film over the silicon-base surface region; (d) a first silicon-base polycrystalline film, over the gate insulating film, having silicon as one of principal constituents; (e) a second silicon-base polycrystalline film disposed over the first silicon-base polycrystalline film, having a smaller average crystal size than the first silicon-base polycrystalline film, and having silicon as one of principal constituents; (f) a tungsten suicide layer, over the second silicon-base polycrystalline film, having tungsten suicide as a principal component; (g) a tungsten nitride film disposed over the tungsten silicide layer, containing W (h) a refractory metal film, over the nitride film, which is thicker than the tungsten silicide layer and has tungsten or molybdenum as a principal component.