Patent ID: 8165852

Claim:
A simulation apparatus of a semiconductor device comprising: a first calculator calculating a voltage to be applied to an area which is a part of a semiconductor area having no electric contact with a current path and functions as a virtual electrode, and setting a pseudo-Fermi level of a first conduction type carrier of a lattice point in the area which is part of the semiconductor area having no electric contact with a current path and functions as a virtual electrode, to calculate a first conduction type carrier density of the lattice point; a second calculator analyzing a current density continuous equation of a second conduction type carrier, having a density smaller than the first conduction type carrier in the lattice point, to calculate a second conduction type carrier density; a third calculator using the first conduction type carrier density calculated by the first calculator as a function of an electrostatic potential of the lattice point, and solving (1) a first simultaneous equation including the function and (2) a Poisson's equation substituting the second conduction type carrier density calculated by the second calculator to calculate an electrostatic potential of the lattice point and the first conduction type carrier density expressed by the function; a fourth calculator calculating a current density of the first conduction type carrier based on the first conduction type carrier density calculated by the third calculator to calculate a current flowing out of the whole of the virtual electrode; and a controller controlling the voltage applied to the virtual electrode as calculated by the first calculator based on the current calculated by the fourth calculator.