Motorized contact setting

The currrents during EQE and LBIC measurements are below 200 mA and flat contact needles are used which allow a close distance to the LBIC reflectance sensor.

For higher currents of several amps a contact frame with narrow pin arrays is used to make the voltage drop along the busbars negligible.

The quality of the contacting is ensured by measuring the resistance between voltage and current pin of each polarity.