Semiconductor device with gate electrodes having conductive films

摘要

First and second gate electrodes are formed spaced from each other on a semiconductor substrate. A pair of impurity diffusion layers are provided on both sides of the first gate electrode at the surface of the semiconductor substrate. The first gate electrode includes a first lower conductive film, a first protective conductive film provided on the first lower conductive film, and a first upper conductive film provided on the first protective conductive film. The second gate electrode includes a second lower conductive film, a second protective conductive film provided on the second lower conductive film, and a second upper conductive film provided on the second protective conductive film. The second upper conductive film extends to be in contact with one of the pair of impurity diffusion layers.