... make silver contact.customer should provide product drawing or sample. The contact material: Ag, FAg, AgNi, AgZnO, AgCuO, AgCdO, AgSnO2, ... German.and this technology is our patent.with this technology,the welding silver contact have following advantage: 1)Green and environmental ... .4)Lower and stable contact resistance.5)High brazed rate,the wave of the weld size is smallest.6)Shortest welding time.7 ...