Core Viewpoint - The shortage of BT substrates is causing a continuous tightening of BGA packaging capacity, leading to delivery cycles extending beyond 20 weeks, while COB packaging is gaining preference due to its cost-effectiveness and stable raw material supply [1] Group 1: BT Substrate Overview - BT resin substrates are essential for BGA packaging, providing mechanical reliability under extreme temperature cycles due to their low thermal expansion coefficient [2] - BGA packaging typically uses multi-layer stacked structures (6-8 layers) for high-reliability chip support [2] Group 2: Causes of BT Substrate Shortage - The surge in AI server demand is straining BT material capacity, with TSMC's advanced packaging expansion prioritizing ABF substrate orders, which share raw materials with BT substrates [3] - Apple has mandated its memory chip suppliers to use BT substrates for the iPhone 17 series, increasing future demand for this packaging solution [3] - Supply-side issues include extended delivery times for key materials like copper foil substrates and high-grade fiberglass cloth, with delays of 4-5 months reported [3] - Geopolitical factors and tariff uncertainties have led to stockpiling by manufacturers, amplifying short-term demand [3] Group 3: Domestic Replacement Progress - Domestic BT substrate manufacturers are still in a technology ramp-up phase, relying on imported materials and equipment, with a highly concentrated supply of low CTE fiberglass cloth [4] - Japanese companies dominate the high-end low CTE fiberglass market, holding 92% market share, while domestic alternatives face significant technical challenges [4] Group 4: Future Supply Outlook - A turning point in BT substrate supply is expected in the second half of 2026, driven by capacity ramp-up and technological advancements in East Asia [5] - Key milestones include the certification of Taiwanese fiberglass suppliers and the ramp-up of domestic production, which will significantly increase supply [5] - By Q3 2026, the shortage rate is projected to narrow to 5%-7%, although challenges remain in high-end sectors due to certification processes and non-linear growth in AI server demand [6]
群智咨询:BT基板短缺致BGA封装产能紧张 车载CIS封装方案加速转型
智通财经网·2025-07-31 09:11