Lead free and environmentally friendly formulas such as Sn99.3Cu0.7 are required, and silver containing solder wires (SnAgCu alloy) are recommended for some high-precision scenarios. The tin content should be moderate to reduce solder head oxidation and ensure melt flowability.

Lead free environmentally friendly materials: Priority should be given to choosing tin copper (Sn Cu) or tin silver copper (Sn Ag Cu) alloys that comply with RoHS standards, which are suitable for the environmental requirements of electronic products.

The welding techniques of solder wire mainly include the following aspects:Preparation: Before welding, ensure that the soldering iron tip is clean, free of solder slag and other oxides, and that a layer of solder is coated on the surface. Select appropriate solder wire and tools, and choose the app···