Patent ID: 7393752

Claim:
A method of fabricating a semiconductor device including a semiconductor substrate having an epitaxial layer doped with a first type of doping material, the method comprising the steps of: impurity doping a first region with the first type of doping material in said substrate to form a first doped well on a source side of the substrate; forming a gate electrode overlying a surface of the substrate and having a gate dielectric formed therebetween; forming a halo implant region on the source side of said substrate by depositing photoresist over a drain side of the substrate and implanting an impurity ion of the first type of doping material selectively into said first doped well at an angle greater than zero from an axis perpendicular to said surface of said silicon substrate, said impurity ion forming the halo implant region in self alignment with said gate electrode and on the source side of said substrate; impurity doping a second region on a drain side of said substrate with a second type of doping material to form a lightly doped drain implant in self alignment with said gate electrode on the drain side of said substrate, wherein impurity doping the second region is performed with a photoresist over the source side of said substrate; impurity doping a third region in said halo implant region to form a source region; and impurity doping a fourth region in said lightly doped drain implant to form a drain region, wherein the halo implant region and the lightly doped drain implant extend beyond the source region and the drain region and into a channel area between the source region and the drain region.