Model Parameters

  We use the intrinsic dopant diffusion coefficients (cf. Fig. 3.1-4) for the uncoupled diffusion model, where the extrinsic dopant conditions are encountered by concentration dependent diffusivities as given in Table 3.1-1.

    
Figure 4.3-1: The uncoupled dopant diffusion model. This model results in retarded diffusion for both species due to concentration dependent diffusivities.
Figure 4.3-2: The coupled dopant diffusion model. The field coupling leads to a significant increase of the boron concentration near the p-n junction.