Patent ID: 11569351

Abstract:
A main semiconductor device element has first and second p+-type high-concentration regions that mitigate electric field applied to bottoms of trenches. The first p+-type high-concentration regions are provided separate from p-type base regions, face the bottoms of the trenches in a depth direction, and extend in a linear shape in a first direction that is a same direction in which the trenches extend. Between adjacent trenches of the trenches, the second p+-type high-concentration regions are provided scattered in the first direction, separate from the first p+-type high-concentration regions and the trenches and in contact with the p-type base regions. Between the second p+-type high-concentration regions adjacent to one another in the first direction, n-type current spreading regions or n+-type high-concentration regions having an impurity concentration higher than that of the n-type current spreading regions are provided in contact with the second p+-type high-concentration regions.