Patent ID: 7205597

Claim:
A DMOS device comprising: a body of semiconductor material of a first conductivity type and a first doping level, said body having a surface; a field region, of insulating material, extending along said surface and separating, in said body, at least one first active area and one second active area; a first conductive region with said first conductivity type and a second doping level, higher than said first doping level, formed in said first active area; a body region with a second conductivity type, formed in said second active area; a second conductive region with said first conductivity type, formed in said body region; at least one body-contact region, with said second conductivity type, formed inside said second conductive region and extending from said surface as far as said body region; an insulating layer, extending on top of said surface and having a plurality of contact openings; and a plurality of contacts of conductive material, extending in said contact openings as far as said first conductive region, said second conductive region and said body-contact region, and wherein each body-contact region has a boundary that is coincident with a boundary of a corresponding contact; and wherein said second conductive region comprises at least one first implanted region, having a third doping level lower than said second doping level, and two second implanted regions, having a fourth doping level higher than said third doping level, said first implanted region comprising a peripheral portion contiguous to said second implanted regions at least on one side facing said first conductive region and a transverse portion extending from said peripheral portion, physically separating and electrically connecting said second implanted regions; said transverse portion accommodating said body-contact region, and wherein a width of the peripheral portion in a transverse direction perpendicular to a length of the peripheral portion is less than a width of the transverse portion along the transverse direction.