PCB Surface Treatment Spray Tin: Lead vs. Lead-Free

• Lead Spray Tin

  Lead spray tin involves adding lead to the tin in a specific proportion to enhance soldering performance. While lead-tin wire offers better mechanical strength and brightness, lead is toxic and harmful to human health. The lower eutectic temperature of lead makes it preferable in some cases, but its environmental impact raises concerns.

• Lead-Free Tin Spray

  Lead-free tin spray is an environmentally friendly alternative with minimal harm to humans. It has a higher melting point, resulting in stronger solder joints. With a lead content not exceeding 0.5, lead-free tin spray is safer for both users and the environment, making it a future development trend.

When comparing lead spray tin and lead-free tin spray, the latter emerges as the preferred choice due to its non-toxic and eco-friendly nature.

About WellCircuits Limited

WellCircuits Limited specializes in manufacturing high-precision PCBs, including double-sided, multi-layer, impedance-controlled, blind buried vias, and thick copper circuit boards. Their product range encompasses HDI, thick copper, backplanes, rigid-flex combinations, buried capacitance, buried resistance, Golden Finger, and other circuit board types to meet diverse customer requirements.