4-layer-dat

The typical lamination order for a 4-layer PCB is:

  • Top Layer: Signal layer
  • Inner Layer 1: Power plane (e.g., VCC or GND)
  • Inner Layer 2: Ground plane (e.g., GND or VCC)
  • Bottom Layer: Signal layer

lamination order

"4-layer PCB stack-up:

  • Top Layer: Signal
  • Inner Layer 1: Power (VCC)
  • Inner Layer 2: Ground (GND)
  • Bottom Layer: Signal

Please follow this lamination order for manufacturing."

ref