Patent ID: 9099550
Filing Date: 2015-08-04
Classification: H01L

Abstract:
1. A semiconductor device including a MOSFET, comprising: a semiconductor substrate having a main surface and a back surface opposite to the main surface; a well region in which a channel of the MOSFET is formed, in the semiconductor substrate; a gate insulating film of the MOSFET; a gate electrode of the MOSFET disposed over the gate insulating film; a source region of the MOSFET disposed in the well region; a source electrode of the MOSFET disposed over the main surface of the semiconductor substrate and coupled to the source region; a drain electrode of the MOSFET disposed over the back surface of the semiconductor substrate and coupled to the semiconductor substrate; a Schottky barrier diode that is adjacent to the MOSFET, the Schottky barrier diode comprising a part of the source electrode and a part of the main surface of the semiconductor substrate; and a semiconductor region having a conductivity type opposite to that of the semiconductor substrate and being formed in the semiconductor substrate adjacent to said part of the main surface of the semiconductor substrate, wherein the semiconductor region and said part of the source electrode comprising the Schottky barrier diode overlap in plan view, wherein the source electrode is comprised of aluminum, and wherein the source electrode and the source region are coupled via a titanium-tungsten film.