Patent ID: 9496339
Filing Date: 2016-11-15
CPC Classification: H01L

Claim Text:
1. A semiconductor device comprising a central portion and an edge termination portion outside the central portion, the central portion comprising a transistor cell array in a semiconductor substrate, components of transistor cells of the transistor cell array being disposed in adjacent trench structures in the semiconductor substrate, the trench structures running in a first linear direction parallel to a main surface of the semiconductor substrate, the trench structures including a plurality of concatenated trench segments in a plane parallel to the main surface in the central portion, at least one of the trench segments connecting a first point and a second point of one trench structure, the first point and the second point being arranged along the first linear direction, wherein the at least one trench segment comprises a portion extending in a direction different from the first direction, wherein the trench segments are undulated and the undulated trench segments comprise a first trench segment having a positive curvature and a second trench segment having a negative curvature.