Soldering terminology

Soldering method developed by Western Electric (USA) in 1975. Perfluorocarbon, fluoropolyether, perfluoro-triamylamine and other chemicals are used as vapor phase medium. These fluids are characterized by a wide temperature range, thermal stability, chemical inertness, non-flammability, low vapor pressure, low surface tension and high density, and are marketed under such names as Fluorinert (3M) or Multiflour (Ausimont). As condensation heat (latent heat) released during transition from the vapor phase into the liquid phase is utilized, heat transfer is faster than at convection reflow soldering.