Patent ID: 7737500
Filing Date: 2010-06-15
Classification: H01L

Abstract:
1. A method for forming a semiconductor device, comprising: forming a gate dielectric layer directly on a top surface of a semiconductor material region having a doping of a first conductivity, wherein said semiconductor material region is located in a semiconductor substrate; forming first and second gate conductors over said semiconductor material region directly on said gate dielectric layer, wherein said first and second gate conductors are spaced apart from each other; implanting first dopant species of said first conductivity type into said first gate conductor and a first region in said semiconductor material region employing a first block mask that covers said second gate conductor and a second region in said semiconductor material, whereby a first doped region having a doping of said first conductivity type and abutting a bottom surface of said gate dielectric layer is formed in said first region; and implanting second dopant species of a second conductivity type into said second gate conductor and said second region employing a second block mask that covers said first gate conductor and said first region, whereby a second doped region having a doping of said second conductivity type and abutting said bottom surface of said gate dielectric layer is formed in said second region, wherein said second conductivity type is the opposite of said first conductivity type, wherein a remainder of said semiconductor material region that is not implanted by said first dopant species and not implanted by said second dopant species includes a third region having a doping of said first conductivity type throughout and abutting said first doped region and said second doped region, and wherein said first and second gate conductor are located over a contiguous area in which a portion of said third region is in direct contact with said gate dielectric layer.