Patent ID: 8975690
Filing Date: 2015-03-10
Classification: H01L

Abstract:
1. A semiconductor device comprising: a first semiconductor region of a first conductivity type; a second semiconductor region of the first conductivity type provided contact with the first semiconductor region and having an impurity concentration higher than an impurity concentration of the first semiconductor region; a third semiconductor region of a second conductivity type provided on a side opposite to the first semiconductor region of the second semiconductor region and being in contact with the second semiconductor region; a fourth semiconductor region of the first conductivity type being in contact with at least part of the third semiconductor region and having an impurity concentration higher than an impurity concentration of the second semiconductor region; a fifth semiconductor region of the second conductivity type provided on a side opposite to the second semiconductor region of the first semiconductor region; a first electrode provided together with the first semiconductor region in a first direction, the first electrode provided together with the third semiconductor region in a second direction, and the first electrode having an end portion of the first semiconductor region side located nearer to the first semiconductor side than a boundary between the second semiconductor region and the third semiconductor region, where a stacking direction of the first semiconductor region and the second semiconductor region is defined as a first direction, a direction orthogonal to the first direction is defined as the second direction, and a direction orthogonal to the first direction and the second direction is defined as a third direction; a second electrode provided between the first electrode and the first semiconductor region and being in electrical continuity with the fourth semiconductor region; and a third electrode being in contact with the fourth semiconductor region.