Copper requirements belong to specific locationsStarting foil, deposited surface copper, deposited hole-wall copper and final finish are separate specifications. The inner construction is simplified; seed layers are not separately resolved.Copper requirements belong to specific locationsConceptual plated-hole cross-section; no thickness scale or universal layer recipeHole openingThin surface finishAdded surface copperStarting foilDielectric / inner stackDeposited hole-wall copperSpecify each location separately; surface thickness does not establish hole-wall thickness.³Ô¹Ïtv · Engineering explanation · Conceptual, not to scale