Measure resistance (make connection) between array of points
To measure, such as silicon substrate resistances, using analog multiplexors, you'll need KELVIN 4-wire measurement.



I remember my confusion the first time I ohmed out the resistance between various pins (I had 7 GND and 7 VDD, for RF signal fidelity) on silicon. Turns out the #substrate-connections (or the #well-ties) has a huge effect on resistance. The distance between various regions.......not so important.