1 : on ceramic package bases, screen printed metals, such as refractory metals; for example, tungsten. [SEMATECH] Also see refractory metallization . 2 : electrolytic or electroless plated metals; for example, nickel and gold, on base metals such as leadframes, or on top of refractory metallizations. [SEMATECH] 3 : on cerdip or cerpack leadframes, evaporated or clad metals; for example, aluminum. [SEMATECH] 4 : the deposition of a thin film of conductive metal onto a wafer or substrate by use of either chemical or physical vapor deposition (for example, sputtering). [SEMATECH]