Patent ID: 10403728

Abstract:
A semiconductor device includes needle-shaped trenches in a semiconductor substrate, each of which includes a field electrode electrically insulated from the semiconductor substrate. Source doping regions and body doping regions of a transistor arrangement are formed in the semiconductor substrate between neighboring ones of the needle-shaped trenches. Gate trenches extend through the source doping regions and the body doping regions. The device further includes a first insulation layer above the semiconductor substrate, an etch stop layer on the first insulation layer, a second insulation layer on the etch stop layer, and an electrically conductive material on the second insulation layer and which contacts the field electrodes, source doping regions and body doping regions through openings which extend through the second insulation layer, etch stop layer and first insulation layer. Islands of the electrically conductive material are surrounded by portions of the second insulation layer above the gate trenches.