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Your outer layer pads need to be 0.017″ larger than the finish tool size (0.010” for vias). Your inner layer pads need to be 0.018″ larger than your finished tool size. If your design has any pad to trace junction minimum requirement, add that to the above numbers [0.017″ pad + 0.002″ junction should have 0.019″ pad].

PCB Glossary

  • ENIG

    Electroless Nickel under Immersion Gold finish. MCL offers ENIG finish for customers with lead-free product requirements.