Pm. Rousseau et al., A MODEL FOR MOBILITY DEGRADATION IN HIGHLY DOPED ARSENIC LAYERS, I.E.E.E. transactions on electron devices, 43(11), 1996, pp. 2025-2027
As arsenic doping concentration increases past the electrical solubili
ty limit, a significant fraction of the arsenic become electrically in
active. This inactive arsenic results in an electron mobility degradat
ion. Using Laser melt annealing and subsequent deactivation anneals, m
obility was studied as a function of active and inactive dose. A model
is presented for this effect based on the theory of scattering by neu
tral defects. Using the model, it is possible to extract active concen
tration profiles from resistive measurements.