Rapid thermal activation and diffusion of boron and phosphorus implants

Crystalline Si was doped with high concentrations of B and P near the surface by low energy ion implantation and electrically activated by rapid thermal annealing (RTA) and the special case of spike annealing. Diffusion depths were determined by secondary ion mass spectroscopy (SIMS). Electrical activation was characterized by sheet resistance, Hall coefficient, and reverse bias diode leakage. While both species show transient enhanced diffusion (TED), electrical activation strongly increases with dose for P implants and comparatively weakly for B implants.