Patent ID: 9177803
Filing Date: 2015-11-03
Classification: H01L

Abstract:
1. A method of forming a semiconductor device structure, comprising: providing a first PMOS active region and a second PMOS active region in a semiconductor substrate; forming a first masking pattern over said first PMOS active region; forming a silicon germanium layer over said second PMOS active region in accordance with said first masking pattern; removing said first masking pattern; forming gate electrode structures over said first and second PMOS active regions; forming a second masking pattern over said first PMOS active region subsequently to said formation of gate electrode structures; performing a first implantation process in the presence of said second masking pattern with a first halo implant dose for forming halo regions in said second PMOS active region; removing said second masking pattern; forming a third masking pattern over said second PMOS active region; and performing a second implantation process in the presence of said third masking pattern with a second halo implant dose for forming lightly doped halo regions in said first PMOS active region, said second halo implant dose being substantially smaller than said first halo implant dose.