Patent ID: 6914309

Claim:
A semiconductor device having a pair of impurity regions in a semiconductor substrate, comprising: a gate insulating film which is formed between the impurity regions; a gate electrode which is formed on the gate insulating film; a first silicon nitride film which is formed on the gate electrode; a sidewall which is formed only by a silicon oxide film so as to reach to a surface of the semiconductor substrate and which is formed on a side surface of the gate electrode; a silicon layer which is selectively formed on the impurity region so as to contact with a surface of the sidewall; a second silicon nitride film which is formed partially on the silicon layer and partially on a side surface of the silicon oxide film; and a conductive layer which is formed on the silicon layer, the first silicon nitride film, and the second silicon nitride film, a conductive film being formed between said conductive layer and said first silicon nitride film.