October 24, 2025
1. Introduction With the rapid rise of 5G communication, automotive radar, satellite networks, and AI hardware, the printed circuit board (PCB) industry is entering an era where high frequency, high speed, and high reliability have become the core competitiveness of manufacturers. Traditional FR-4 materials can no longer meet the strict requirements for low loss, impedance control, and signal integrity. RF and high-frequency PCBs, therefore, represent the technological frontier of the electroni