1 layer PCB: copper and dielectric order1 layer PCB: copper and dielectric orderL1 — copperOne substrate dielectricMaterial + dielectric thickness to specifyWHAT THE COUNT MEANS1 conductive copper faceNo interlayer PP bondCopper counted separatelyfrom substrate dielectric.Define material and finish.Then define:signal / ground / power rolesand each dielectric thickness.Engineering illustration, not to scale. Reference geometry is not a released manufacturing stackup.