For the manufacturing of ultra-shallow source/drain junctions in sub-100nm CMOS generations, precise control of the diffusion and activation behavior of the implanted dopants becomes increasingly important. This work focuses on the characterization of the dopant pile-up, a thin layer of extremely high dopant concentration. It is created during an anneal at the silicon-oxide interface. Results from Elastic Recoil Detection (ERD) and Rutherford Back Scattering (RBS) together with Secondary Ion Mass Spectrometry (SIMS) are used to investigate the influence of the various implant and anneal parameters as well as the type of screening oxide used. A phenomenological model for pile-up formation is proposed. In the pile-up, a high electrically active dopant concentration is observed, well above bulk solid solubility.
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For the manufacturing of ultra-shallow source/drain junctions in sub-100nm CMOS generations, precise control of the diffusion and activation behavior of the implanted dopants becomes increasingly important. This work focuses on the characterization of the dopant pile-up, a thin layer of extremely high dopant concentration. It is created during an anneal at the silicon-oxide interface. Results from Elastic Recoil Detection (ERD) and Rutherford Back Scattering (RBS) together with Secondary Ion Mas...
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