Patent ID: 7343571

Claim:
A simulation model for designing a semiconductor device used by a simulation apparatus for designing a semiconductor device, comprising: adding at least a part of a difference between a density of a carrier described in a quasi-static manner with respect to a voltage applied between first and second electrodes at a predetermined first time and a density of the carrier described in a transient state at a predetermined second time before the first time to the density of the carrier described in the transient state at the second time in accordance with a delay by the carrier running between the first and second electrodes from the first time until the second time to thereby describe the density of the carrier at the first time in the transient state with respect to at least one semiconductor element having at least two first and second electrodes, and this process is processsed by a first describing unit included in the simulation apparatus; describing a current flowing between the first and second electrodes as a sum of a current flowing between the first and second electrodes in the quasi-static manner, and a displacement current which is a ratio of a change of the quasi-static density of the carrier with time between the first and second electrodes, and these processes are processed by a second describing unit included in the simulation apparatus; and assuming that the density of the carrier in the transient state satisfies the current flowing between the first and second electrodes to thereby describe the quasi-static density of the carrier as a non-quasi-static model, and this process is processed by a third describing unit included in the simulation apparatus.