Patent ID: 9059284
Filing Date: 2015-06-16
Classification: H01L

Abstract:
1. A semiconductor device comprising: a first semiconductor layer of a first conductivity type; a second semiconductor layer of a second conductivity type provided on the first semiconductor layer; a third semiconductor layer of the first conductivity type provided on the second semiconductor layer; a first electrode electrically connected to the first semiconductor layer; a second electrode extending from the third semiconductor layer and reaching the first semiconductor layer; a third electrode provided between the first electrode and the second electrode; an insulating film provided between the second electrode and the second semiconductor layer and between the third electrode and the first semiconductor layer; a fourth electrode extending from the third semiconductor layer and reaching the first semiconductor layer, and the fourth electrode contacting the second semiconductor layer and the third semiconductor layer; a fourth semiconductor layer of the second conductivity type contacting the fourth electrode, the fourth semiconductor layer being selectively provided in the first semiconductor layer; and the third electrode being electrically connected to one of the fourth electrode and the second electrode, a Schottky junction at a sidewall of the fourth electrode and the first semiconductor layer, and the sidewall facing the second electrode.