³Ô¹Ïtv / ENGINEERING NOTEEvidence sequence: Multilayer Metal Core PCB Design1ArchitectureMetal-backed, internal-core and single-circuit IMS distinguished.2HoleFinished bore, barrel copper, core opening and registration.3InsulationGeometric remainder separate from qualified electrical performance.4EvidenceCritical sections, process route and acceptance plan agreed.Conceptual drawing. Not to scale; not manufacturing or compliance evidence.