Patent ID: 9570607
Date: 2017-02-14
CPC Classifications: H01L

Claim:
1. A field-effect semiconductor device, comprising: a semiconductor body comprising a first surface, an edge delimiting the semiconductor body in a direction substantially parallel to the first surface, an active area, and a peripheral area arranged between the active area and the edge; a source metallization arranged on the first surface; and a drain metallization, in a vertical cross-section substantially orthogonal to the first surface, the semiconductor body further comprising: a plurality of alternating first n-type pillar regions and first p-type pillar regions arranged in the active area, the first n-type pillar regions being in Ohmic contact with the drain metallization, the first p-type pillar regions being in Ohmic contact with the source metallization, and an integrated dopant concentration of the first n-type pillar regions substantially matching an integrated dopant concentration of the first p-type pillar regions; at least one second p-type pillar region in Ohmic contact with the source metallization, arranged in the peripheral area and having an integrated dopant concentration smaller than the integrated dopant concentration of the first p-type pillar regions divided by a number of the first p-type pillar regions; and at least one second n-type pillar region arranged between the at least one second p-type pillar region and the first p-type pillar regions, and having an integrated dopant concentration smaller than the integrated dopant concentration of the first n-type pillar regions divided by a number of the first n-type pillar regions, wherein the integrated dopant concentration of the at least one second p-type pillar region is smaller than the integrated dopant concentration of the at least one second n-type pillar region.