Then, multiplying the measured resistance (R in the unit of Q) with the sample thickness (t) and
the Resistivity Correction Factor (RCF) derives the volume resistivity. In this way, the 4-pin probe
method and 4-terminal method have a common measurement system, but the electrode sections
in contact with the sample is different. Only the placement of a probe on a sample is required for
measurement in this 4-pin probe method, but electrode formation over the sample is not required
unlike the 4-terminal method and thus the procedure is remarkably more efficient.