Patent ID: 9733297
Date: 2017-08-15
CPC Classifications: G01N,G01R

Claim:
1. An apparatus for observing an electric field concentration position in a semiconductor device, the apparatus comprising: a laser light source; an irradiation optical system configured to irradiate the semiconductor device with laser light output from the laser light source; a voltage application unit configured to apply a predetermined voltage between electrodes of the semiconductor device; a sensor configured to detect an electrical property occurring in the semiconductor device in response to irradiation of the laser light and output a detection signal; and an image generation unit electrically coupled to the sensor and configured to generate one of a plurality of electrical property images of the semiconductor device based on the detection signal, wherein the voltage application unit gradually increases a magnitude of the predetermined voltage until the predetermined voltage reaches a voltage at which avalanche amplification occurs in the semiconductor device; and the apparatus further comprises a determination unit electrically coupled to the sensor and configured to determine whether the avalanche amplification occurs based on the one of the plurality electrical property images corresponding to the predetermined voltage applied form the voltage application unit.