HDI STACKUP & SEQUENTIAL LAMINATION: 1+N+1, 2+N+2 & VIA SPANS ³Ô¹Ïtv engineering preparation worksheet /resources/hdi-stackup-lamination/ Version 2026.09.16-linked-resources-r1 Project / customer: ____________________ PCB / assembly part number: ____________________ Document revision: ____________________ Prepared by / date: ____________________ Quantity / intended application: ____________________ Use this as an editable preparation checklist. It is not a manufacturing release, supplier certificate, inspection report or quote. REVIEW ITEMS 1. Copper numbering and total count Requirement / reference: ____________________ Owner / due date: ____________________ Evidence / decision / open question: ____________________ 2. Build-up notation and cross-section Requirement / reference: ____________________ Owner / due date: ____________________ Evidence / decision / open question: ____________________ 3. Via pairs and stacked/staggered relationships Requirement / reference: ____________________ Owner / due date: ____________________ Evidence / decision / open question: ____________________ 4. Inner structure and buried vias Requirement / reference: ____________________ Owner / due date: ____________________ Evidence / decision / open question: ____________________ 5. Materials, copper/dielectric thickness and tolerances Requirement / reference: ____________________ Owner / due date: ____________________ Evidence / decision / open question: ____________________ 6. Impedance targets and reference layers Requirement / reference: ____________________ Owner / due date: ____________________ Evidence / decision / open question: ____________________ 7. Fabricator-proposed process sequence Requirement / reference: ____________________ Owner / due date: ____________________ Evidence / decision / open question: ____________________ 8. Assembly thermal exposure and verification Requirement / reference: ____________________ Owner / due date: ____________________ Evidence / decision / open question: ____________________ 9. Approved stack linked to drill/fabrication revisions Requirement / reference: ____________________ Owner / due date: ____________________ Evidence / decision / open question: ____________________ APPROVAL AND HANDOFF Open items and permitted exceptions: ____________________ Agreed next action and responsible owner: ____________________ Released file manifest / approval reference: ____________________ Send only the appropriate project information through the Contact page. This worksheet does not upload files or transfer parameters automatically.