Patent ID: 9035398
Filing Date: 2015-05-19
Classification: H01L

Abstract:
1. A semiconductor device, comprising: an interlayer insulating film on a substrate, the interlayer insulating film including a trench; a gate insulating film in the trench, the gate insulating film being conformal along sidewalls and a bottom surface of the trench; a diffusion film on the gate insulating film, the diffusion film including a first diffusion material; a work function adjustment film under the diffusion film, the work function adjustment film including the first diffusion material; a gate metal structure on the diffusion film, the gate metal structure including a second diffusion material; and a diffusion prevention film between the gate metal structure and the diffusion film, the diffusion prevention film being configured to prevent diffusion of the second diffusion material from the gate metal structure, wherein a first diffused material diffused from the diffusion film exists in the gate insulating film.