. . "The adhesive layer 34 preferably comprises either a metal nitride such as TiN, TaN, WN, TiSiN, TiAlN, TiBN, ZrSiN, ZrAlN, MoSiN, MoAlN, TaSiN, or TaAlN, or a metal silicide such as WSiX, TiSiX, MoSiX, TaSiX, or CoSiX." . .