Patent ID: 6888206

Claim:
A power semiconductor device comprising: an impurity substrate surface of low concentration having a first conductivity type formed in a predetermined region of a substrate surface; an impurity region of high concentration having a second conductivity type formed in said substrate surface adjacent to said impurity substrate surface; a conductor formed over said substrate surface to be insulated from said impurity substrate surface; a conductive shield formed to include at least part of a region over said impurity substrate surface other than a region where said conductor is formed and to include a region overlapping a boundary region between said impurity substrate surface and said impurity region, said conductive shield being formed over, but not directly contacting, said impurity substrate surface and said impurity region with a predetermined insulation film interposed therebetween, at least part of said conductive shield being connected to said conductor; and an electrode in contact with said conductive shield and comprised of a different compound than said conductive shield.