Corrosion of printed circuit board assemblies (PCBAs) - Field experience and counter measures

摘要

Due to the fact that the population of electronic boards is becoming increasingly smaller and denser its robustness is suffering from it. If no countermeasures are taken, climatic circumstances and impurities on the surface will consequently lead to electrical and functional shortfall. Copper, silver, tin and alloys are widely used on electronic boards to grant electrically and heat conductive properties. Those substances are prone to corrode with the influence of oxygen and humidity. Time to failure is even shorter, when accelerating agents like salts and acids are within reach.