Patent ID: 7091558

Claim:
A MOS power device, comprising: a body of semiconductor material having a first conductivity type and a surface; at least two gate regions, of semiconductor material, arranged on top of said surface of said body and insulated from said body by gate-insulation regions, said gate regions being arranged at a distance from one another and delimiting between them a window having a given width; a body region housed in said body, underneath said window, said body region having a second conductivity type and a first doping level; a conductive region, accommodated in said body region and facing said surface, said conductive region having said first conductivity type and a second doping level; a dielectric region covering said gate regions; and a metal region extending on top of said dielectric region and being in electrical contact with said body and conductive regions; characterized by: first contact regions, distinct from said body region, extending from said surface through said conductive region as far as said body region; and second contact regions, extending in said conductive region and having said first conductivity type and a third doping level greater than said second doping level, said second contact regions extending at the side of said first contact regions in a direction perpendicular to the width of the window; wherein said dielectric region further extends on top of said conductive region, at least piece-wise, throughout the width of said window and has first and second openings on top of said first and, respectively, second contact regions, and wherein said metal region extends through said first and second openings and is in direct electrical contact with said first and second contact regions.