Design for Manufacturability (DFM) is the discipline of making sure a board that works in CAD can actually be built — reliably, repeatably and at a sensible cost. For a first product, a few simple checks prevent most re-spins.
1. Talk to your fab house before layout
Minimum trace/space, drill sizes, annular ring and available stack-ups vary between manufacturers. Import their capabilities into your design rules before routing the first trace.
2. Footprints are where boards fail
- Verify every footprint against the datasheet's recommended land pattern
- Check pin-1 markings and polarity on silkscreen
- Confirm 3D body heights for enclosure clearance
3. Think about assembly
- Keep a consistent orientation for polarised parts
- Add fiducials for pick-and-place machines
- Leave clearance around tall parts and connectors for rework
- Avoid via-in-pad unless it is filled and capped
4. Design for test from day one
Add test points on power rails, clocks and key communication buses. A few millimetres of copper now saves hours with a probe later.
5. Review the BOM for availability
A beautiful board with an end-of-life regulator is not manufacturable. Check lifecycle status and stock for every line item and record approved alternates.
At Nirman Technology, DFM and DFT reviews are included on every layout we deliver. If you'd like a second pair of eyes on your design, get in touch.