Keithley 2615 4 Point Probe AN free download

File name 2615 4 Point Probe AN.pdf

Number 2615 Application Note Measuring the Resistivity and Determining the Series Conductivity Type of Semiconductor Materials Using a Four-Point Collinear Probe and the Model 6221 DC and AC Current Source Introduction The two outer probes source current, while the two inner probes sense the resulting voltage drop across the sample. The Resistivity and conductivity type are fundamental properties volume resistivity is calculated with this equation: of semiconductors and are critical parameters in both materi- V als research and wafer fabrication. A semiconductor's resistivity = ____