HDI PCB fabrication involves producing high-density interconnect circuit boards with fine traces, microvias, and multiple layers. This advanced manufacturing process supports compact, high-speed, and high-performance electronic devices. HDI PCBs are widely used in smartphones, networking equipment, and industrial electronics. https://www.hemeixinpcb.com/company/news/488-design-basics-for-hdi-and-the-hdi-pcb-manufacturing-process.html