Abstract
The electronics industry is heading towards lead-free soldering. But the moving of lead-free soldering faces some obstacles, for example cost, resource depletion energy consumption, and the characteristic of solder itself etc. Especially the problem of energy consumption is not clear yet. We examined the energy consumption of PWB with lead-free solder comparing to the conventional tin-lead solder. The results show that lead-free soldering will increase the energy consumption. But this increase of energy occupies about only 0.1% in the energy consumption in electronics industry. Meanwhile, if this increase trigger replacing it with new reflow oven, the energy consumption of PWB with lead-free solder is saved more than now.