How to do BGA fanout – VIAs & Layers

What you may want to think about when doing BGA fanout …

Using VIA in PAD? What you need to know – Guidelines, dimensions and more
How to Route DDR3 Memory and CPU fan-out
Review of Server PCB Layout & Schematic – Part 6: DDR4 Memory Layout & CPU Power
PCB Layout Planning – How to decide on what Layers we should use