In recent years, with the increase in interest in environmental pollution, there has been a growing trend to eliminate heavy metals, especially the lead contained in the solder widely used in electronic and electric devices. The reason is that when the enormous volume of electric products discarded is exposed to acid rain, the lead inside could leach out and potentially pollute soil or groundwater. Used of lead is already forbidden inside the EU. Anticipating such trends, Nihon Gemna was one of the first companies to begin developing Pb-free solder. Nihon Genma's Pb-free solders, which despite being lead-free have the equivalent functionality and performance as lead solders and can be used in the same production facilities, are used in electronic and electric devices applied in all aspects of people's lives, from business to medicine. These solders are environmentally friendly and contribute to safe lifestyle.