Patent ID: 9685442
Date: 2017-06-20
CPC Classifications: H01L

Claim:
1. A semiconductor device, comprising: an insulating film in a first region of a semiconductor substrate; a first impurity region of a first conductivity type and a second impurity region of the first conductivity type, each of the first impurity region and the second impurity region including a part located deeper than the insulating film, and the insulating film being sandwiched by the first impurity region and the second impurity region in planar view in the first region of the semiconductor substrate; and a metal silicide film on the first impurity region and in Schottky junction with the first impurity region, wherein the first impurity region contains a first impurity of the first conductivity type such that a peak of a concentration profile is deeper than a bottom of the insulating film, the second impurity region contains a second impurity of the first conductivity type, a concentration of the second impurity in the second impurity region being higher than a concentration of the first impurity in a part of the first impurity region shallower than the bottom of the insulating film, and the first impurity region and the second impurity region are in contact with each other at a position deeper than the bottom of the insulating film.