Patent ID: 6154718
Filing Date: 2000-11-28
Classification: G06F

Abstract:
A method for simulating the diffusion of impurities during ion implanting process and thermal diffusion process in a semiconductor LSI fabrication, which comprises the steps of:(a.) obtaining an intensity of absorption of point-defects in a semiconductor substrate during said thermal diffusion process, said intensity being represented by a local function of a distribution of an initial concentration of point-defects which generate during the ion implanting process, an argument of said distribution is an analytic coordinate vector;(b.) generating a diffusion equation including a term representing absorption of impurities by said point-defects said term containing as a factor said intensity of the absorption of the point-defects;(c.) solving said diffusion equation generated at step (b); and(d.) displaying the results of step (c.) of solving said diffusion equation in a graph application, wherein the diffusion of impurities during the ion implanting process and thermal diffusion process for a given distribution of the initial concentration of point defects is anticipated before performing the ion implanting process and thermal diffusion process.