Patent ID: 11942517
Assignee: SUMITOMO ELECTRIC INDUSTRIES, LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 2:
3. The silicon carbide semiconductor device according to claim 1, wherein
when it is assumed that a width of the first region is a first width and a width of the second region is a second width in the first direction and when it is assumed that an impurity concentration of the first region is a first concentration and an impurity concentration of the second region is a second concentration, a value obtained by dividing, by a value obtained by multiplying the second concentration by the second width, a value obtained by multiplying the first concentration by the first width is more than or equal to 0.5 and less than or equal to 1.5, and
when it is assumed that a width of the third region is a third width and a width of the fourth region is a fourth width in the first direction and when it is assumed that an impurity concentration of the third region is a third concentration and an impurity concentration of the fourth region is a fourth concentration, a value obtained by dividing, by a value obtained by multiplying the fourth concentration by the fourth width, a value obtained by multiplying the third concentration by the third width is more than or equal to 0.5 and less than or equal to 1.5.