Patent ID: 11101383

Abstract:
A semiconductor device of an embodiment includes: a first semiconductor layer of a first conductive type; a second semiconductor layer of the first conductive type, being provided on the first semiconductor layer and including a first trench, a plurality of holes, a plurality of second trenches, and a plurality of third trenches; a first semiconductor region of a second conductive type, being provided on the second semiconductor layer; a second semiconductor region of the first conductive type, being provided on the first semiconductor region; a first electrode electrically connected to the second semiconductor region; a second electrode disposed in the first trench via a first insulation film; a plurality of first field plate electrodes having a column shape, being electrically connected to the first electrode, interposing the second electrode, and being disposed in the holes via a second insulation film; a plurality of third electrodes extending from ends of the first insulation films in a first direction to the first direction, being disposed in the second trenches via third insulation films and extending from ends of the second electrodes in the 1st direction to the first direction; a plurality of second field plate electrodes extending in the first direction, being apart from the first field plate electrodes, being disposed in the third trenches via fourth insulation films, being electrically connected to the first field plate electrode via the first electrode, and interposing the third electrode; and a fourth electrode electrically connecting the second electrode and the third electrode.