A professional DFM review typically covers: 1. PCB Fabrication Checks Trace width & spacing Annular ring size Drill tolerances Layer stack-up compatibility
Impedance requirements
2. Assembly (DFA) Checks Component spacing Pad design vs package type Solder mask openings Polarity and orientation Fiducial marks 3. Data Consistency Checks Gerber vs BOM alignment Pick & Place accuracy Reference designator matching 4. Process Compatibility Reflow profile suitability Panelization strategy Testability (ICT / functional test points) Common Issues Found During DFM From real-world PCBA projects, some of the most frequent issues include: Incorrect or missing footprints Inconsistent BOM and design files Overly tight spacing for assembly Missing fiducials for automated placement Unclear polarity markings Non-standard pad sizes for BGAs 👉 These are small on paper—but critical in production.
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