Semiconductor device

A semiconductor device including a super junction structure including a first column region of a first conductive type and a second column region of a second conductive type disposed adjacent to the first column region, the semiconductor device further including:

• first and second electrodes that are disposed on one side of the super junction structure and that constitute a transistor and are configured to control a current flowing in the transistor;
• and a third electrode that is disposed on an opposite side of the first and the second electrodes with the super junction structure interposed therebetween and that constitutes the transistor,
• the semiconductor device comprising:
• a first semiconductor layer of the second conductive type disposed on the first column region and the second column region;
• a second semiconductor layer of the first conductive type disposed on the first semiconductor layer;
• a first semiconductor region of the first conductive type that is a semiconductor region electrically connected to the first electrode, the first semiconductor region being disposed in a surface layer portion of the second semiconductor layer to be separated from the first semiconductor layer;
• and
• a second semiconductor region of the second conductive type that is a semiconductor region electrically connected to the second electrode, the second semiconductor region being disposed at least in the surface layer portion of the second semiconductor layer to be separated from the first semiconductor region and being electrically connected to the first semiconductor layer.