AI servers primarily involve three key PCB product categories: GPU substrates commonly employ high-layer boards exceeding 20 layers; compact AI accelerator modules predominantly rely on 4–5-layer HDI for high-density interconnections; while traditional CPU motherboards form the. AI servers primarily involve three key PCB product categories: GPU substrates commonly employ high-layer boards exceeding 20 layers; compact AI accelerator modules predominantly rely on 4–5-layer HDI for high-density interconnections; while traditional CPU motherboards form the. AI server PCBs serve as the fundamental electronic platform, connecting and supporting the processors, memory, accelerators, and power management systems required for artificial intelligence computational workloads. Within AI servers, PCB design addresses high-speed signal transmission, high power. This guide explores HDI PCB technology from design to manufacturing, addressing signal integrity, reliability, and cost optimization for AI applications. As a HDI PCB manufacturer, EBest Circuit (Best Technology) delivers superior HDI PCB solutions for AI server motherboards through advanced. Highleap Electronics provides critical AI Server PCB manufacturing solutions for high-performance computing in AI and machine learning, supporting applications from data centers to edge AI with speed and quality. As the global AI server shipments soar at a growth rate of over 80%, the number of layers of traditional server motherboards has exceeded the 18-layer technical threshold, and the demand for high-end HDI boards. HDI PCB for AI hardware uses high density interconnect structures, microvias, via-in-pad, sequential lamination, ELIC, fine-line routing, low-loss materials, high-layer-count stackups, and advanced thermal control to support GPU systems, TPU platforms, AI accelerator modules, graphics cards, and. AI Server HDI (high-density interconnect) PCB by Application (Universal Server, Logical Server, Training Server), by Types (20 Layers, 24 Layers, Other), by North America (United States, Canada, Mexico), by South America (Brazil, Argentina, Rest of South America), by Europe (United Kingdom.