Patent ID: 7304329
Filing Date: 2007-12-04
Classification: H01L

Abstract:
1. A field effect transistor comprising: a semiconductor substrate; an active region located in an upper portion of the semiconductor substrate; source and drain regions located in the upper portion of the semiconductor substrate so that the active region is located between the source and drain regions; a gate electrode located on the active region; a source electrode located on the source region and forming an ohmic contact with the source region; a drain electrode having a base part located on and in ohmic contact with the drain region and an extended part extending toward the gate electrode, over and beyond a boundary between the active region and the drain region; a Schottky junction between the gate electrode and the active region; and an insulating film located between the boundary and the extended part and having a thickness that increases with position along a direction extending from the drain electrode to the gate electrode.