Patent ID: 7771822

Claim:
Conductive material of a cupriferous alloy for use in plug or clamp connectors, with a coating deposited at least one parts of its contact surface, said contact layer consisting of at least one bonding layer and one carbon-containing antifriction layer, with a support layer which is provided between the bonding layer and the antifriction layer, or that the bonding layer serves as the support layer characterized in that the antifriction layer has a carbon content greater than or equal to 40% with an atomic percentage smaller than or equal to 70 and that the bonding layer and/or the support layer contains small amounts of one or several of the following elements and/or their alloys: Ag, Au, Cu, Fe, Ir, Mo, Ni, Pd, Pt, Os, Rh, Ru, W and that the contact resistance is between 0.1 and 90 mΩ.