In multi-layer PCBs, inner layers provide very important functions past signal routing. Power planes and floor planes are dedicated layers that provide minimal-impedance power distribution and return paths, respectively. These planes provide many benefits: Sustaining signal integrity has become the greatest problems in PCB structure, Primarily with high-speed signals. Inside https://arthurzelmr.blog-gold.com/38775897/the-basic-principles-of-4-layers-pcb-with-ic-carrier