Patent ID: 7582948

Claim:
An integrated transistor comprising: a semiconductor substrate; a first connection region remote from a main area of the semiconductor substrate and contained in the semiconductor substrate, the first connection region being doped in accordance with a basic doping type and being arranged at a distance from the main area of the semiconductor substrate; a drift region contained in the semiconductor substrate, the drift region being doped in accordance with the basic doping type with a lower dopant concentration than the first connection region, and the drift region being arranged between the first connection region and the main area; a second connection region near the main area, the second connection region being doped in accordance with the basic doping type and being arranged nearer to the main area of the substrate than the first connection region; a reverse doping region, which is doped in accordance with a different doping type than the basic doping type and separates the drift region from the second connection region; an electrically insulating isolating trench extending from the main area in the direction of the first connection region, the drift region extending from the first connection region to the reverse doping region; and an auxiliary trench extending from the main area at least as far as the first connection region.