Patent ID: 6870223
Filing Date: 2005-03-22
Classification: H01L

Abstract:
1. A semiconductor device having a transistor comprising: a semiconductor substrate of a first conductivity type; at least one first semiconductor region of a second conductivity type formed on a first main surface of the semiconductor substrate; a second semiconductor region of the first conductivity type formed within the first semiconductor region; a drain region of the second conductivity type and a source region of the second conductivity type formed within the second semiconductor region; a gate insulating film formed on the surface of the second semiconductor region and positioned between the drain region and the source region; a gate electrode formed on the gate insulating film; a source electrode connected to the second semiconductor region and the source region; a drain electrode connected to the drain region; and a Schottky barrier diode having a cathode electrode connected to the drain electrode and an anode electrode connected to the source electrode, wherein both the cathode and anode electrodes are on the first main surface of the semiconductor substrate, and wherein both the anode and cathode electrodes are at the surface of the first semiconductor region, the anode electrode forming a Schottky junction with the first semiconductor region, and the cathode electrode forming an ohmic contact with the first semiconductor region.