ENIG and ENEPIG: identify every deposited layerENIG and ENEPIG: identify every deposited layerENIGENEPIGPCB substrateCopperNickelGoldPCB substrateCopperNickelPalladiumGoldLayer thickness exaggerated for explanation³Ô¹Ïtv · ENGINEERING SCHEMATIC · NOT PRODUCTION OR TEST EVIDENCE