Dry skin conductance electrode

A method of providing a skin conductance sensor, the skin conductance sensor comprising first and second dry electrodes, the sensor being adapted to sense skin conductance of skin of a user between the first and second dry electrodes, the first and second dry electrodes being dry skin conductance electrodes for contacting the skin of the user, the method comprising:

• providing, for the first and second dry electrodes, at least one inner layer, the inner layer comprising metal;
• and
• providing, for the first and second dry electrodes, an outer layer, the outer layer comprising a material made of a noble metal doped with at least one dopant selected from the group consisting of hydrogen, lithium, sodium, potassium, rubidium, cesium and beryllium, wherein the noble metal comprises one or more of ruthenium, rhodium, palladium, osmium, iridium, platinum, or gold, wherein the outer layer is disposed at an outer surface of the first and second dry electrodes for interfacing with the skin such that the first and second dry electrodes and the skin form a non-polarizable skin-electrode interface, and wherein the outer layer is provided via one of the following:
• (i) sputtering or (ii) co-deposition in vacuum by evaporation and/or e-beam deposition or co-deposition in vacuum.