Patent ID: 7466151

Claim:
An electric-field distribution measurement method for a semiconductor device, comprising: a holding step of applying a predetermined voltage to a semiconductor device on which a two-dimensional circuit is formed, and holding the semiconductor device in an applied state; an irradiation step of irradiating a laser beam having a predetermined wavelength onto the two-dimensional circuit of the semiconductor device, which is held in the applied state, so as to scan it two-dimensionally; a detection/conversion step of detecting an electromagnetic wave, which is radiated from a laser-beam irradiation position on said semiconductor device to which said laser beam is irradiated, and converting the electromagnetic wave into an electric-field signal, which changes temporally; and a judgement step of judging the phase of the electric-field signal which changes temporally, and the electric-field distribution measurement method for the semiconductor device, wherein the electric-field direction distribution of said semiconductor device is measured using the fact that the phase, which is judged in said judgement step, depends on the electric-field direction at the laser-beam irradiation position.