"Further, if the substrate is a synthetic resin or the like and is electrically insulative, the electrode for outputting the electric current is desirably formed by a preliminary surface treatment by plating, vapor deposition, sputtering, or the like of a metal or an alloy, such as Al, Ag, Pt, Au, Ni, Ti, Mo, W, Fe, V, Cr, Cu, stainless steel, brass, nichrome, or a transparent conductive oxide (TCO" . . . .