Tungsten/Copper Alloy Foil (Light Tight) (W80/Cu20)

Tungsten Copper Alloy Foil Light Tight (W80/Cu20) combines the extreme strength and high-temperature endurance of tungsten with copper’s superior electrical and thermal conductivity, manufactured in a foil free of pinhole defects for maximum integrity. With 80% tungsten, the foil exhibits excellent arc erosion resistance, dimensional stability, and wear resistance, while the copper content provides efficient heat dissipation and electrical conduction. Industries including aerospace, defense, and high-power electronics use W80/Cu20 foils in light-blocking and conductive applications. Specific uses include shielding layers in vacuum electronic devices, pinhole-free optical barriers in photonic systems, and conductive foils for aerospace sensor packaging. In research, W80/Cu20 light-tight foils are examined for thermal cycling endurance, microstructural stability, and defect prevention strategies. Their dual role as an electrically conductive and pinhole-free structural barrier makes them indispensable in advanced electronic and defense systems.