POI substrate market projected to reach $5.15 billion by 2032

The global market for Piezoelectric-on-Insulator (POI) substrates is expected to experience rapid growth, driven by the advancement of 5G communications and increasing demand for high-frequency RF filters. According to a report by YHResearch, the market is projected to expand from $964 million in 2025 to $1.216 billion in 2026, eventually reaching $5.154 billion by 2032, representing a compound annual growth rate (CAGR) of 27.2% between 2026 and 2032.

POI substrates, which consist of high-resistance silicon substrates, insulating layers, and piezoelectric single-crystal thin films such as lithium niobate (LiNbO3) or lithium tantalate (LiTaO3), are essential for high-performance RF front-end filters. These materials offer high-frequency characteristics, low loss, and high Q-factors, making them vital for smartphones, 5G infrastructure, IoT sensors, and automotive communication units.

Future growth opportunities include integration with compound semiconductors like gallium nitride (GaN) for high-power applications in base stations and automotive radar, as well as applications in Wi-Fi 6E/7 and ultra-wideband (UWB) technologies. However, commercialization faces challenges regarding manufacturing costs, yield rates, and the transition to larger 8-inch wafers. Supply chain risks also exist due to the concentrated supply of raw materials like lithium niobate.