In multi-layer PCBs, inner layers provide critical features past signal routing. Power planes and floor planes are focused layers that supply minimal-impedance power distribution and return paths, respectively. These planes provide various benefits: Improved Power Distribution: By incorporating different power and floor planes, six-layer PCBs distribute power much more successfully, https://16-layer5-orderhdihigh-fr06061.webbuzzfeed.com/31750121/the-ultimate-guide-to-four-layers-of-soft-and-hard-board