In multi-layer PCBs, inner layers serve essential capabilities past signal routing. Power planes and ground planes are focused layers that provide very low-impedance power distribution and return paths, respectively. These planes supply quite a few rewards: To use circuits on either side, there needs to be a suitable circuit connection https://six-layer-high-frequency73827.blogscribble.com/31287097/how-six-layer-long-and-short-gold-finger-pcb-circuit-board-can-save-you-time-stress-and-money