Soldering is let board welding surface directly with high temperature liquid tin to achieve the purpose of welding, the high temperature liquid tin keep a slant, and by a special device to make the liquid tin forming a similar wave phenomenon, so called "wave", the main material is solder.
Wave soldering refers to the solder alloy melted by electric pump or the electromagnetic pump jet into the design requirements of the solder wave also by injecting nitrogen into the solder pool formed by solder wave components welding or soldering printed end pins and the mechanical and electrical connection between the solder on the printed circuit board with components in advance.