Reflow Soldering
This process is also widely used in electronics to assemble surface mount
components to print circuit boards. In this process a solder paste consisting of
solder powders in a flux binder is applied to spots on the board where electrical
contacts are to be made between surface mount components and the copper circuit.
The components are placed on the paste spots, and the board is heated to melt the
solder, forming mechanical and electrical bonds between the component leads and
the copper on the circuit board.