1. PCB surface treatment options 2. gold-plated PCBs advantages 3. immersion gold vs gold plating 4. tin spray PCB applications 5. gold finger PCB connections

PCB surface treatments include various options like immersion gold and tin spraying, each with distinct advantages; immersion gold offers better solderability and longevity compared to tin, while gold plating enhances shelf life and flatness for high-density applications, though at a higher cost. Would you like to explore a specific aspect further?