wave soldering

**Wave soldering** is the **through-hole and mixed-assembly soldering process where PCB underside contacts a controlled molten solder wave** - it is widely used for high-throughput joining of through-hole components. **What Is Wave soldering?** - **Definition**: Board passes over one or more solder waves after fluxing and preheating stages. - **Primary Use**: Best suited for through-hole components and selected bottom-side SMT parts. - **Process Variables**: Wave height, conveyor speed, preheat, and flux chemistry determine joint quality. - **Defect Modes**: Bridging, icicles, insufficient fill, and skips are key control targets. **Why Wave soldering Matters** - **Throughput**: Delivers fast soldering for high-volume through-hole production. - **Cost**: Efficient for boards with many through-hole joints. - **Consistency**: Well-tuned wave process provides repeatable barrel-fill performance. - **Limitations**: Less flexible for dense selective patterns and heat-sensitive assemblies. - **Mixed-Tech Risk**: Requires protection strategies for previously reflowed SMT parts. **How It Is Used in Practice** - **Fixture Design**: Use pallets or masks to protect sensitive regions during wave exposure. - **Parameter Tuning**: Optimize preheat and dwell to achieve full barrel fill without bridging. - **Pot Management**: Control solder alloy composition and contamination through regular analysis. Wave soldering is **a high-productivity soldering method for through-hole assembly operations** - wave soldering performance depends on synchronized control of flux, preheat, wave dynamics, and alloy quality.