Gold/Tin Alloy Spooled Wire (Au80/Sn20)

Gold/Tin Alloy Spooled Wire (Au80/Sn20) is a eutectic alloy prized for its high melting point (~280 °C), excellent wettability, and ability to form fluxless, void-free joints, making it a mainstay in high-reliability microelectronics and optoelectronic assembly. The alloy combines gold’s corrosion resistance and electrical conductivity with tin’s soldering efficiency, resulting in stable, oxidation-resistant bonds even under thermal cycling. Applications span hermetic sealing for microwave modules, die attachment for semiconductor devices, and high-precision photonic component assembly. The spooled format supports high-speed automated bonding processes, ensuring uniform feed and consistent material integrity across large-scale production. Specific uses include laser diode mounting, GaAs chip brazing, and gas-tight packaging for aerospace-grade sensors. In research, Au80/Sn20 wire is investigated for its intermetallic formation behavior, phase stability, and long-term reliability in harsh operating environments, cementing its role as a critical material in advanced manufacturing and innovation.