Empirical Modeling of Low Energy Boron Implants in Silicon

Abstract
The depth distribution of low energy boron implants in silicon are analyzed using secondary ion mass spectroscopy. The profiles for equivalent energy implants of B+ (10–30 keV) and (50–120 keV) are compared. Fluorine trapping in implants is also investigated. New range parameters are extracted from the measured profiles using a least squares fitting technique. The Pearson IV distribution provides an excellent representation of the doping profile in B+ implants, while for implants the profiles are better represented using a gaussian distribution with an attached exponential tail.

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