Two-dimensional modeling and simulation for dynamic sheath expansion during plasma immersion ion implantation

A pseudo two-dimensional (2-D) analytical model and a 2-D plasma simulator PDP2 code have been utilized to characterize ion-matrix sheath and dynamic sheath expansion during the plasma immersion ion implantation process. The pseudo 2-D model is very simple by involving two geometry factors and yields an acceptable accuracy under the current process conditions. Good agreement between the pseudo 2-D model and PDP2 simulation was observed.