Compensation unit e.g. field effect transistor, has compensation field extended parallel to connection direction between electrodes, where field has tapered cross sectional surface in direction of drain electrode

摘要

The unit has body and drift zones (3, 2) extended between gate, source and drain electrodes (G,S,D) having respective zones. The body zone is provided adjacent to the electrodes (G, S). The drift zone is laid between the body zone and one of the zones of the electrodes. A compensation field (5) is provided below the body zone, and is formed in a columnar manner. The field with its longitudinal direction is extended parallel to a connection direction between the electrodes, where the field has a tapered cross sectional surface in the direction of the electrode (D).