Thermal Immune NiSi Technology for Nano-scale CMOSFETs

In this paper, thermally stable nickel silicide (NiSi) technologies are investigated for nano-scale CMOS technology. Co/TiN double capping layer is investigated first. Co/TiN double capping is highly efficient in retarding Ni diffusion during high temperature post silicidation annealing by forming CoNiSi ternary layer at the top region of silicide. Then, hydrogen plasma implantation before Ni/Co/TiN deposition is shown to be desirable for nano-scale CMOS technology