An advanced packaging approach that processes packages on a large rectangular panel rather than a circular wafer or as separate package substrates. Panel-level packaging (PLP) includes fan-out panel-level packaging (FOPLP), in which singulated known-good die may be placed on a temporary carrier and reconstituted in molding compound, while other flows form the redistribution layer (RDL) before molding. A typical flow can include die placement or reconstitution, molding and carrier release, RDL formation and metal plating, thinning, inspection, and singulation. PLP is used for compact high-I/O packages and heterogeneous integration, including packages that combine multiple die or passive components. Compared with wafer-level packaging (WLP), its rectangular format can improve area utilization and potentially throughput for suitable package sizes; compared with conventional die/package assembly, fan-out routing can extend beyond the die footprint before packages are separated. Those advantages are process- and design-dependent: large panels require control of warpage, thermal stress, dimensional stability, die-shift and alignment, layer uniformity, handling, and yield, so PLP is not universally preferable to wafer-based or conventional assembly.