my stack up is as seen on the right side of the image
1 Front.cu (Signal)
2 Ground.cu(Ground)
3 Routing1.cu(Signal)
4 Routing2.cu(Signal)
5 Power.cu(Power)
6 Back.cu(Signal)
why do we need to have multiple ground or multiple power plane ?
Prepreg thickness is decided by the assembly house correct or do i need to mention it in the pcbnew design if so how ?
as i understand power planes and ground planes are not meant for routing signals due to impedence on these plane signal is attenuated this was well explained in my previous link bellow is the link PCB designing for 6 layer by Joan_sparky and keryseykaryu please see in the beginning of this link?