This second volume of the Advanced Packaging Update includes an analysis of OSAT financials; AI packaging trends; die-to-wafer hybrid bonding applications and challenges; and an analysis of RF packaging trends. An updated analysis of build- up substrate supply and demand is presented, along with an assessment of alternatives such as glass 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.