Firstly, it exhibits exceptional anti-oxidation and mechanical stability. The chemical inertness of the outermost Gold (Au) layer creates a dense protective barrier, allowing the wire to withstand oxidative corrosion even in extreme storage environments and offering an extended shelf life of over 12 months. This composite structure provides excellent Free Air Ball (FAB) sphericity and chemical stability, ensuring the formation of high-quality alloy balls during bonding that can endure thermal stress in high-density packaging without deformation. Secondly, it boasts outstanding interface reliability and process adaptability. The intermediate Palladium (Pd) layer acts as a critical diffusion barrier, significantly retarding the abnormal growth of intermetallic compounds (IMC) at the Cu-Al interface and effectively suppressing the Kirkendall voiding effect at high temperatures. Its three-in-one layered structure not only mechanically enhances the wetting of the Stitch Bond but also protects fragile Aluminum pads through optimized ball hardness. This ensures gold-like performance while significantly streamlining the packaging process and remarkably extending the long-term service life of the semiconductor device.