PCB design

Before the first fabrication run: a practical PCB review

Creayzo Embedded Labs October 25, 20264 min read

Sending a PCB to fabrication is a commitment of time, components, and engineering effort. A deliberate review before release helps catch avoidable mistakes while they are still inexpensive to fix. At Creayzo Embedded Labs, we treat manufacturing handoff as a design milestone, with the schematic, layout, and output files reviewed together.

Start with requirements, not just the board view

Confirm the supply range, connectors, mechanical envelope, and interfaces against the product requirements. A layout can look complete while still using the wrong connector orientation or missing access for a programming cable.

Keep a short review record covering decisions, open questions, and the person responsible for resolving each item. Resolve unknowns before generating release files.

Check connector pinouts and mating orientation.
Verify mounting holes, board outline, and enclosure clearances.
Confirm component footprints against the selected part packages.

Run electrical and layout checks

Run the schematic electrical checks and PCB design rule checks using constraints appropriate to the selected manufacturer. In KiCad, review rule violations, unconnected items, and schematic-to-PCB parity. An ignored warning should have a recorded reason.

Automated checks complement an engineering review. Inspect return paths, decoupling placement, and the routing of sensitive signals against the relevant component documentation. A clean DRC report does not establish that every functional requirement has been met.

Review the manufacturing package as a separate deliverable

Open the exported fabrication layers in a viewer and check the outline, drills, copper, and solder mask. Confirm that the bill of materials and placement data correspond to the same board revision.

Ask the manufacturer about unclear constraints before placing the order. A filename or drawing note should make the intended revision easy to identify without opening the design project.

Generate fabrication and assembly files from the reviewed revision.
Check component availability and document any approved alternatives.
Include stackup requirements and assembly notes where relevant.

Plan how the first board will be tested

Before ordering, write down the initial power-on sequence and the measurements needed to establish that each subsystem is working. Check that the layout provides practical access to the required rails, debug connections, and test points.

A good release package supports both manufacturing and the engineer who will bring up the first boards. That preparation makes failures easier to isolate and design changes easier to track.