The impact of lead-free regulations on PCB boards

The impact of lead-free regulatory development on PCB board? assembly£¬Lead-containing solder and lead alloy surface mount technology (SMT) have been widely used in electronic product manufacturing technology for a long time.
PCB board processing special process

For example, in the bare holes of multilayer PCB board, if they are filled with silver paste or copper paste instead of the orthodox copper hole wall.