Patent ID: 7291875
Filing Date: 2007-11-06
Classification: H01L

Abstract:
1. A semiconductor device comprising: a transistor having a gate electrode that is provided via a gate insulation film on a semiconductor substrate, a metal layer that is provided on the gate electrode, and diffusion layers that are separately provided in the semiconductor substrate such that the gate electrode is provided on a region lying between the diffusion layers, each of the diffusion layers serving as a source or a drain; a first barrier film that is provided on the diffusion layer, which serves as the source or drain of the transistor, and on side walls of the transistor; a first insulation layer that is provided on the first barrier film; a second barrier film that is continuously provided on the metal layer and on the first insulation layer; a second insulation layer that is provided on the second barrier film; an opening portion that is provided in the second barrier film and is located over the diffusion layer; a first contact plug that continuously penetrates the second insulation layer, the first insulation layer and the first barrier layer through the opening portion, and is provided on the diffusion layer; and a second contact plug that continuously penetrates the second insulation layer, the second barrier film and the metal layer and establishes electrical connection to the gate electrode.