Ionic Adsorbents for High-Reliability Electronic Encapsulation Controlling Ionic Impurities in Sensitive Electronic Materials Modern electronic devices depend on increasingly compact circuits, finer conductive pathways and high-performance encapsulation materials. As electronic components become smaller and more complex, even trace levels of ionic impurities can create long-term reliability risks. Ions such as sodium, chloride and bromide may originate from raw materials, catalysts, fillers, processing aids or environmental contamination. Under heat, humidity and electrical bias, these mobile ions can migrate through a resin or adhesive system and contribute to corrosion, insulation deterioration and electrical failure. Ionic adsorbents are designed to selectively capture undesirable