A polymer layer comprising silicone contains oxide particles of SiO.sub.2, TiO.sub.2, Sb.sub.2O.sub.3, SnO.sub.2, Al.sub.2O.sub.3, ZnO, Fe.sub.2O.sub.3, Fe.sub.3O.sub.4, talc, hydroxyapatite or mixtures thereof and one or more metal traces embedded in the polymer layer, where the metal trace is bonded to the polymer silicon metal bond.