The document introduces an 'advanced substrate' activity by Yole Développement, focusing on the analysis of printed circuit boards (PCBs), integrated circuit (IC) substrates, and redistribution layers (RDLs) to better understand market dynamics and technology trends. This first report outlines objectives including market forecasts, supply chain analysis, and competitive technology identification, aimed at fostering integration and understanding within this evolving sector. Key drivers for advanced substrates are identified as the ongoing scaling of semiconductor technologies and the diversification of applications, particularly influenced by advancements in mobile devices and the Internet of Things (IoT).