How Does a Reflow Soldering Machine Work?

The reflow soldering process involves several key stages:
  1. Solder Paste Application: Solder paste, a mixture of tiny solder particles and flux, is applied to specific areas on the PCB where components will be placed.
  2. Component Placement: Electronic components are placed onto the solder paste using automated pick-and-place machines.
  3. Preheating: The PCB is gradually heated to activate the flux in the solder paste and prepare the components for soldering.
  4. Soaking: The PCB is held at a specific temperature to ensure even heat distribution and further activate the flux.
  5. Reflow: The temperature is increased to melt the solder paste, forming strong electrical connections between the components and the PCB.
  6. Cooling: The PCB is cooled gradually to solidify the solder joints and prevent thermal shock.