White Paper Highlights How Shrinking Solder Powder Sizes Increase Cleaning Complexity in Advanced Packaging

Advanced semiconductor packaging technologies are driving increased miniaturization and higher component density to meet the demands of modern electronics such as 5G, IoT, and automotive applications. System-in-Package (SiP) architectures increasingly rely on ultra-fine solder powders to support low-pitch, low-standoff components. However, finer solder powder sizes require higher flux activator content, leading to increased residue formation and cleaning complexity. Inadequate flux removal can result in electrical leakage, corrosion, and long-term reliability risks. This white paper investigates the impact of solder powder size on cleaning efficiency and evaluates optimized aqueous-based cleaning strategies for advanced packaging assemblies.