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PCB manufacturer STACKUP documents

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  • PCB manufacturer STACKUP documents

    hi All
    I have 2 question about Lession 3 and 4 of Advance PCB Laytout.
    1 - If i ask a stackUP document from PCB manufacturer, what i have to send them about information?
    So, how they can generate that document?
    2 - About data ram signal, i thinked to route every data block without matching length.
    In second time, redraw every tracks with the same length of too longer track found, is correct?

  • #2
    1. The more information, the better. Things to consider:

    - General information about the board.
    - Layer count.
    - Type of the different layers - signal, power, planes.
    - For the signal layers, do you have controlled impedance signals on a particular layer and what is the impedance supposed to be. You might have a few different impedances on a single layer as well - for example single ended 50 ohm, differential 100 ohm, differential 90 ohm, etc.
    - What types of vias do you need - do you need blind/buried/micro vias and between which layers.
    - Estimation of what constrains you need - track width/gap on particular layers, via sized, etc. Of course the final track geometry will be provided with the manufacturer's stack.
    - Anything else that could be useful.

    2. This strategy sounds alright to me.


    • #3
      Hello nicola67761.

      1) This may help you: How to design PCB stackup

      2) yes, this is one of the ways how you can do it. Many times I do it the way, the I found the shortest track one and I try to make it as long as the longest is. If that is not possible, I do it as long as possible and find another shortest track. I repeat this until all the tracks are the same length.


      • #4
        thank you very much, maiormaster and Robert
        i will try to do this with my pcb manufacturer.