Patent ID: 11927626
Assignee: HAMAMATSU PHOTONICS K.K.
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 6:
7. A semiconductor sample inspection method, comprising:
applying a voltage to a semiconductor sample by an external power supply device;
acquiring a test signal output from the semiconductor sample according to the voltage application by the external power supply device;
acquiring a reference signal output from a reference signal output section connected to the external power supply device in electrical parallel with the semiconductor sample, according to an output of the external power supply device;
irradiating and scanning the semiconductor sample to which a voltage is being applied by the external power supply device, with light;
acquiring a processing signal obtained by performing processing for removing a noise component due to the output of the external power supply device on the test signal based on the reference signal;
setting, based on a strength of the processing signal, a gain of the reference signal output section, the gain with which the reference signal is output according to the output of the external power supply device;
measuring electrical characteristics of the semiconductor sample based on the processing signal, the processing signal being subjected to the removal processing performed based on the reference signal from the reference signal output section for which the gain has been set; and
outputting a defective portion of the semiconductor sample based on the electrical characteristics of the semiconductor sample.