Choose a route before locking the spanThe same topology label can hide different manufacturing routes. Review the actual layer span and build sequence before setting the artwork.Choose a route before locking the spanMechanical, laser and sequential constructions need review1Required connectionIdentify surface, destination and routing reason.Keep the electrical connection separate from physical hole extent.2Accessible buildConfirm when the target can be reached during fabrication.Agree the materials and drilling method for that build.3Geometry and finishReview depth, landing, taper, plating and optional fill.Use the fabricator-approved dimensions and tolerances.4VerificationDefine process evidence for the actual structure.Microvia reliability review is more than a final visual check.³Ô¹Ïtv · Engineering illustration · Conceptual, not to scale