This second volume of the Advanced Packaging Update includes an analysis of OSAT financials; chiplet packaging applications and market forecast; and HBM trends. A special section on RDL as an alternative to silicon interposer is included. Developments in build-up substrate are presented, along with an assessment of alternatives such as glass, silicon, and ceramic core substrates. TechSearch International’s annual survey on substrate design rules is presented, with special coverage of suppliers of laminate flip chip BGA and CSP substrates worldwide. The design rules include body size, core thickness, via and pad diameter, minimum bump pitch supported, and substrate finish.