Patent ID: 8072028

Claim:
A transistor component, including: a semiconductor body having a first side and at least one first trench extending from the first side, the at least one first trench having sidewalls and lower and upper trench sections; a first field electrode arranged in the lower trench section of the at least one first trench and being insulated from the semiconductor body by a field electrode dielectric, the first field electrode having a vertical length; a dielectric layer on the first field electrode in the at least one first trench; a gate dielectric, the gate dielectric at least lining the sidewalls in the upper trench section of the at least one first trench; a gate electrode in the upper trench section, gate electrode being insulated from the first field electrode by the dielectric layer, a thickness of the dielectric layer being at least 50% of the vertical length of the field electrode; an edge region of the semiconductor body; a second trench arranged in the edge region, and extending from the first side into the semiconductor body; a second field electrode arranged in the second trench, the second field electrode being insulated from the semiconductor body by a second field electrode dielectric, and extending further in the direction of the first side than the first field electrode.