³Ô¹Ïtv / ENGINEERING NOTEEvidence sequence: Invar PCB Expansion Control1IdentityExact alloy, condition and supplied foil or composite form.2ModelFree expansion comparison, not constrained stress or composite CTE.3ConstructionAll layers, bonds, symmetry and processing defined.4AcceptanceDimensional limit, interval and representative assembly evidence.Conceptual drawing. Not to scale; not manufacturing or compliance evidence.