Patent ID: 6044213
Filing Date: 2000-03-28
Classification: G06F

Abstract:
A method of simulating a process for oxidation of silicon, said method comprising the steps of:setting a time ""t"" of oxidation calculation at zero;calculating an effective surface oxidant concentration of a silicon surface exposed to an oxygen atmosphere assuming that a spontaneous silicon oxide film as an initial silicon oxide film extends over said silicon surface;forwarding said time ""t"" of oxidation calculation by a predetermined time increment .DELTA.t;calculating an oxidation rate by use of one of said effective surface oxidant concentration and said surface oxidant concentration;forming a new silicon surface based upon said calculated oxidation rate and said time increment .DELTA.t;finding variations in thickness of said silicon oxide film over time by a deformation calculation;verifying whether or not said time ""t"" of oxidation calculation reaches a predetermined end time so that if said time ""t"" of oxidation calculation reaches said predetermined end time, then a current simulation is ended, whilst if said time ""t"" of oxidation calculation does not reach said predetermined end time, then an oxidant diffusion equation is solved for a deformed silicon oxide film to calculate said surface oxidant concentration of the silicon surface to be oxidized; andrepeating a loop comprising said sequential third to seventh steps until said time ""t"" of oxidation calculation reaches said predetermined end time.