Patent ID: 7521758

Claim:
A process for manufacturing a DMOS device comprising: providing a body of semiconductor material having a surface, a first conductivity type, and a first doping level; forming, along said surface, a field region of insulating material that separates, in said body, at least one first active area and one second active area; forming, in said first active area, a first conductive region with said first conductivity type and with a second doping level, higher than said first doping level; forming, in said second active area, a body region with a second conductivity type; forming, in said body region, a second conductive region with said first conductivity type; forming, inside said second conductive region, at least one body-contact region having said second conductivity type and extending from said surface as far as said body region; forming, on top of said surface, an insulating layer; forming a plurality of contact openings through said insulating layer; and forming contacts of conductive material inside said contact openings; characterized in that said step of forming a body-contact region is performed after said step of forming a plurality of contact openings and prior to said step of forming contacts so that said body-contact region is self-aligned to a respective contact.