Packaging reliability depends on stable materials, controlled assembly, and verification under realistic stresses. Typical evaluations include temperature cycling, humidity exposure, mechanical tests, and electrical monitoring.
Mold compounds, die-attach materials, substrates, leadframes, bonding wires, and underfills work as one material system. Their thermal expansion, moisture behavior, adhesion, and cleanliness strongly influence reliability.
Package selection affects board area, signal integrity, heat dissipation, manufacturability, and inspection. Common choices include leaded packages, QFN, BGA, wafer-level packages, and advanced multi-die modules.
Semiconductor packaging protects the die, creates electrical connections, removes heat, and provides a practical form for assembly. A sound package design balances electrical, thermal, mechanical, and cost requirements from the start.