Patent ID: 7285823
Filing Date: 2007-10-23
Classification: H01L

Abstract:
1. A superjunction switching device comprising: a body of semiconductor material having a major surface; a body region of a first conductivity type formed extending from the major surface into the body of semiconductor material; a source region of a second conductivity type opposite the first conductivity type formed within the body region; a control electrode formed in proximity to the body region and configured to form a channel region in the body region; a charge compensation trench region formed in the body of semiconductor material, wherein the charge compensation trench region is configured to provide a current path for the superjunction switching device when in an on-state of operation, and wherein the charge compensation trench region is laterally set apart from the body region at the major surface so that the body of semiconductor material is interposed between the body region and the charge compensation trench region; and a first conductive layer independent of the control electrode and electrically coupled to the charge compensation trench region, wherein the first conductive layer is configured to enhance switching speed when the superjunction switching device is switched from a first state to a second state.