Specific Process Knowledge/Characterization/Four-Point Probe: Difference between revisions
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==Four-Point Probe== | ==Four-Point Probe== | ||
[[Image:Probe_diagram.PNG|thumb|200x200px|Probe diagram]]The set-up of the four point probe is four the tungsten carbide electrodes/probes.The power source (DC) sends a current through the two outer electrodes. A digital voltage meter (DVM) measures the potential drop between the two inner electrodes. | [[Image:Probe_diagram.PNG|thumb|200x200px|Probe diagram (from https://www.ossila.com/pages/sheet-resistance-theory)]]The set-up of the four point probe is four the tungsten carbide electrodes/probes.The power source (DC) sends a current through the two outer electrodes. A digital voltage meter (DVM) measures the potential drop between the two inner electrodes. | ||
The sheet resistance can then be calculated using the equation below: | The sheet resistance can then be calculated using the equation below: | ||