Part of the rigid-flex circuit board resource.
Start with a revision manifest
Put a revision identifier and date on the package. List the included files and the document that governs when information conflicts. Confirm that fabrication data, drill data, stackup, mechanical drawing, and assembly information describe the same release. Label incomplete information as preliminary rather than allowing the supplier to infer final approval.
Include the regional construction
Show which copper layers continue through the flex, finished thickness per region, material requirements, coverlay openings, rigid-to-flex boundaries, bend directions, and critical dimensions. Attach a folded view when it communicates assembly intent that the flat drawing cannot.
Define the commercial comparison
Request the same quantities, schedule, finish, testing, inspection documentation, and delivery basis from each partner. Identify permitted substitutions and ask the supplier to list deviations explicitly. Separate one-time tooling and setup from recurring charges.
Add the assembly scope
Provide the BOM, approved part alternatives, placement data, polarity and orientation information, fixture constraints, and functional test instructions. Specify customer-supplied parts and any programming step. Do not assume that a bare-board quotation includes assembly engineering.
Resolve the final questions before release
Track DFM responses against the drawing revision. Confirm who can approve a material change, stack adjustment, tolerance deviation, or test exception. Keep the reviewed stackup with the final package so an update to the layout does not accidentally revert the construction.
Continue with the design guidelines, assembly review, prototype plan, or project RFQ.