Define a fabricator-approved layer stack and drill pairs before using blind or buried vias in the layout. Exact menu locations depend on the installed software version.
What to consider
Translate the stackup into allowed via spans, dimensions and net-class constraints. Confirm that exported manufacturing files preserve the intended layer pairs. A software DRC pass proves only that the board follows the configured rules; it cannot qualify an unsupported manufacturing process.
A practical review example
Create a small test board containing every approved via type and inspect its drill outputs with the fabricator. Resolve interpretation differences before exporting the production design.
Checks before release
- Use the current official documentation for your installed version.
- Name via types by start/end layers.
- Validate exported drill and stackup information.
Connect this decision to fabrication
Use the design checklist to organize the initial discussion. Keep proposed values separate from the approved drawing and document the effect of any change on the rest of the construction.
- Use rules confirmed for the chosen factory and construction.
- Inspect return paths through every critical breakout.
- Release consistent artwork, drills, stackup and drawing revisions.
Technical references
HDI design and manufacturing overviewFabrication design guidelinesReferences checked 2 October 2026. Manufacturer data describes its stated construction and is not an HDIPCB.org manufacturing commitment.