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About plugged vias under BGA

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  • About plugged vias under BGA

    Hi everyone,

    I have a BGA.
    The manufacturer is asking if I want plugged vias.
    I only have 2 vias for the fan out.
    At present time, they don't have any via type according to IPC 4761.

    I usually ask the vias to be covered with solder mask.

    What are the pros and cons to declare the vias as plugging vias.
    There are 4 different types of plugging vias in AD.
    Which one do you suggest?


  • #2
    The is a lot of thing to be said about vias and their covering.
    One of more interesting page that mentions this is this one:
    Vias are plated holes that connect signals between layers, and are typically smaller than ordinary plated holes that are used for soldering through-hole components.

    But there are multiple, like

    The main downside of the IPC 4761 via types is their additional cost.


    • #3
      mabye is not that because some of your vias are touching the pads?