Modeling Dopant Diffusion in Strained and Strain-Relaxed Epi-SiGe

Ultra-shallow arsenic and boron diffusion in both strained and strain-relaxed SiGe has been investigated in this paper. Significant arsenic diffusion enhancement and boron diffusion retardation have been observed. Strained SiGe was found to have a stronger arsenic diffusion enhancement. Empirical equations in Arrhenius form have been created and incorporated into numerical simulation to successfully model the diffusion dopant profiles.