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Current carrying Capacity of filled vias

gowthaman90d

Hi,

While discussing with my colleague, he said conductive filling of vias has no impact on current carrying capacity.

When current carrying capacity of vias depends on the plating thickness, why via filling has no effect on current carrying? I think we are increasing the amount of conductor through the barrel. Please explain.

Regards,

Gowthaman

  • excellon1

    Hi,

    Doing a conductive fill wont achieve the same level of current handling as plating shut a via. It basically cant because conductive fill is an epoxy loaded with silver, not a solid wire.
    When the epoxy cures you still have resistance as it is not a perfect conductor.

    Paul

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