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4 or 6 layers

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  • 4 or 6 layers

    Hi everyone,

    I have a design involving 2 power supplies.
    I made it using 4 layers.
    I have components on top and bottom layers.
    I used top layer for analog part.
    I used layer 2 for both power supplies and signals because I get enough place to do so. I cannot use a smaller board.
    I used layer 3 for signals.
    I used bottom layer for digital part with MCU.

    Is there any advantage to improve the design with 6 layers involving 2 planes, one both power supplies and the other one for GND.
    Thanks for your thoughts.

  • #2
    But I don't like to split planes even they are power supplies planes!


    • #3
      You will always be better/safer with a dedicated GND plane.
      Also, and specially you having a analog top and a digital bottom you will want as much separation/shielding as you can between the two.


      • #4
        I agree with goncaloc, I would use at least 1 layer dedicated to solid GND plane. If you would not have 1 solid GND plane you can run into many problems.

        This video may help you: