In the ever-evolving world of electronics, printed circuit boards (PCBs) play an important function, acting as the backbone of virtually all electronic gadgets. These functional elements are critical for the mechanical support and electrical links needed for electronic circuits. As innovation advances, so does the complexity and performance of PCBs. http://ezproxy.cityu.edu.hk/login?url=https://hdicircuitboard.com/en-gb/multilayer-pcb/