Patent ID: 8548787

Claim:
An apparatus for performing a simulation, comprising: a microprocessor coupled to a memory, wherein the microprocessor is programmed to perform the simulation by: calculating a comprehensive reaction probability, for which an influence of a surface structure of a semiconductor device is taken into account, the comprehensive reaction probability being either one of a reaction probability between a chemical species and the semiconductor device and a deactivation probability of the chemical species, the comprehensive reaction probability being assumed to be nondependent upon a concentration of the chemical species; and performing a simulation of a physical phenomenon occurring in a reaction chamber by using the comprehensive reaction probability as a boundary condition; wherein the calculating either one of a reaction probability between a chemical species and a semiconductor device and a deactivation probability of the chemical species includes recalculating either one of the reaction probability and the deactivation probability based on the processed-profile, and the performing the simulation of the physical phenomenon includes performing the simulation of the physical phenomenon based on the recalculated either one of the reaction probability and the deactivation probability, when an amount of change of the recalculated either one of the reaction probability and the deactivation probability exceeds a predetermined threshold value.