Advanced packaging (semiconductors)

Advanced packaging is the aggregation and interconnection of components before traditional electronic packaging. Advanced packaging allows multiple devices (electrical, mechanical, or semiconductor) to be merged and packaged as a single electronic device. Unlike traditional electronic packaging, advanced packaging employs processes and techniques that are performed at semiconductor fabrication facilities. Advanced packaging thus sits between fabrication and traditional packaging -- or, in other terminology, between BEoL and post-fab. Advanced packaging includes multi-chip modules, 3D ICs, 2.5D ICs, heterogeneous integration, fan-out wafer-level packaging, system-in-package, quilt packaging, etc.