Patent ID: 9306007
Filing Date: 2016-04-05
CPC Classification: H01L

Claim Text:
1. A semiconductor device comprising: a structural body having a first surface, the structural body comprising a first semiconductor region comprising silicon carbide of a first conductivity type, a second semiconductor region comprising silicon carbide of a second conductivity type, and a third semiconductor region comprising silicon carbide of the first conductivity type, the structural body having a portion in which the first semiconductor region, the second semiconductor region, and the third semiconductor region are arranged in an order from the first semiconductor region toward the third semiconductor region in a first direction along the first surface; an insulating film provided on the first surface of the structural body; and a control electrode provided on the insulating film, the structural body having a region comprising a group V element provided between the second semiconductor region and the first surface, wherein the region comprising a group V element is directly adjacent to the third semiconductor region, the region comprising a group V element includes a region apart from the first surface in a second direction perpendicular to the first surface, the region comprising a group V element further comprises an impurity of the second conductivity type, a concentration of the group V element in the region comprising a group V element is substantially equal to concentration of the impurity of the second conductivity type in the region comprising a group V element, a distribution in the second direction of the concentration of the group V element is substantially equal to a distribution in the second direction of the concentration of the impurity of the second conductivity type, the region comprising a group V element is of the first conductivity type, and a channel provided in the second semiconductor region is positioned directly below the region comprising a group V element.