Patent ID: 9721952
Date: 2017-08-01
CPC Classifications: H01L

Claim:
1. A semiconductor device comprising: a substrate; a first interlayer insulating film disposed in a first region of the substrate and including a first trench; a second interlayer insulating film disposed in a second region of the substrate and including a second trench; a first gate insulating film formed along sidewalls and a bottom surface of the first trench; a second gate insulating film formed along sidewalls and a bottom surface of the second trench; a first work function adjusting film disposed in the first trench and including a bottom portion and sidewall portions extending upwardly from the bottom portion, the first work function adjusting film being disposed on sidewalls and a bottom surface of the first gate insulating film; a second work function adjusting film disposed in the second trench and including a bottom portion and sidewall portions extending upwardly from the bottom portion, the second work function adjusting film being disposed on sidewalls and a bottom surface of the second gate insulating film; a first adhesive film disposed in the first trench; a second adhesive film disposed in the second trench; a first metal gate pattern disposed on the first adhesive film and filling the first trench; and a second metal gate pattern disposed on the second adhesive film and filling the second trench, wherein an uppermost surface of the second metal gate pattern is higher above the substrate than is an uppermost surface of the second work function adjusting film.