Patent ID: 8866220

Claim:
A semiconductor device comprising: a semiconductor section having a first trench and a second trench spaced apart from the first trench; a first control electrode provided in the first trench and across a first insulating film from the semiconductor section; a second control electrode provided in the first trench and spaced apart from the first control electrode; a first electrode provided in the second trench and across a second insulating film from the semiconductor section; a second electrode provided in the second trench and spaced apart from the first electrode; and a third electrode provided on the semiconductor section, wherein the semiconductor section comprises: a first semiconductor region of a first conductivity type provided between the first trench and the second trench; a second semiconductor region of a second conductivity type provided on the first semiconductor region and opposed to the first control electrode; a third semiconductor region of the first conductivity type provided on the second semiconductor region; and a fourth semiconductor region of the second conductivity type provided on the second semiconductor region and having an impurity concentration higher than an impurity concentration of the second semiconductor region, and wherein the fourth semiconductor region is provided to contact with the second insulating film.