Patent ID: 8129784

Claim:
A semiconductor device comprising an LDMOSFET including a source region, a drain region, and a gate electrode formed at a main surface of a semiconductor substrate comprising silicon, said device comprising: said semiconductor substrate of a first conductivity type; said gate electrode comprising silicon and formed via a gate insulating film over said semiconductor substrate; said source region of a second conductivity type formed at the main surface of said semiconductor substrate; and said drain region of said second conductivity type formed at the main surface of said semiconductor substrate; wherein a metal silicide film is formed on said gate electrode and on said source region, and no metal silicide film is formed on said drain region, wherein a field plate electrode with a side wall spacer shape is formed via a first insulating film on a side surface of said gate electrode located over said drain region, wherein a second insulating film is formed over said field plate electrode and over said drain region such that a part of said field plate electrode is exposed from said second insulating film, wherein said metal silicide film is also formed on an exposed surface of said field plate electrode, wherein an interlayer insulating film is formed over said semiconductor substrate, said gate electrode, said source region, said drain region, said field plate electrode and each of said metal silicide films, and wherein said metal silicide films are formed from a same silicide formation layer.