Device with intermittent contact improved by dielectrophoresis

A device comprising:

• a substrate having a first contact pad with a contact area,
• a second contact pad integral to the substrate and comprising a contact area, the second contact pad moving with respect to the first contact pad between an ohmic contact position between said contact areas and another position,
• a decontamination electrode arranged on the substrate and surrounding the first contact pad,
• an additional electrode arranged on the substrate and surrounding the a decontamination electrode,
• a decontamination device configured to apply a first non-uniform electric field between a decontamination electrode and an additional electrode, the decontamination device being configured in such a way that the first electric field comprises diverging or converging electric field lines in the direction of the additional electrode with an electric field gradient increasing or decreasing in the direction of the decontamination electrode along the surface of the substrate separating the decontamination electrode from the additional electrode.