Patent ID: 8507351

Claim:
A method, comprising: forming a first implantation mask above a first device region and a second device region of a semiconductor device, said first implantation mask covering said second device region and exposing said first device region; performing a first implantation process on the basis of a first parameter setting to implant a first dopant species to define a first dopant profile laterally adjacent to a first device feature formed above said first device region; forming a second implantation mask above said first and second device regions, said second implantation mask covering said first device region and exposing said second device region; reducing a lateral extension of a second device feature formed above said second device region by using said second implantation mask as an etch mask, wherein said reduction in the lateral extension of the second device feature is determined based on a first diffusivity of the first dopant species and a second diffusivity of a second dopant species; and performing a second implantation process on the basis of a second parameter setting to implant the second dopant species to define a second dopant profile laterally adjacent to said second device feature.