Service Manuals, User Guides, Schematic Diagrams or docs for : Keithley Appnotes 2615 4 Point Probe AN

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                                                   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             = ____ 

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