To protect against moisture, dust, chemicals, and temperature extremes, SMT companies coat Conformal Coating Chemical on PCBA by using brushing, spraying, dispensing and dip coating. Danyang Soltec has developed special Solder Paste which can coat on the soldering area with conformal coating chemical during reflow process. This special solder paste will protect avoid ion migration and corrosion of PCBA without Conformal Coating process.