PCB Design for Manufacturability (DFM) for China
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This tag covers PCB design-for-manufacturability (DFM) when the board will be fabricated and assembled in China — the layout rules that keep a design cheap and yield-friendly. It spans trace spacing, via sizing, component clearances, stencil aperture ratios, fiducials, and test-point placement. Getting DFM right before sending Gerbers avoids the back-and-forth where a Chinese factory flags a board for engineering change after you've already locked a schedule.
When you hand a design to a Chinese factory, a DFM-clean layout is the difference between a smooth quote and a week of email queries. We run a DFM review against the factory's capability sheet — minimum trace/space, drill sizes, aperture ratios — and add fiducials and test points before release so first-article yield isn't a surprise.
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FAQ
Why does DFM matter before sending a board to China?
A design that violates the factory's minimum trace, via, or clearance rules gets held for engineering change, adding days and revision risk. A DFM review up front keeps the quote firm and the first article on schedule.
What DFM details do Chinese factories most often flag?
Common flags are sub-capability trace/space, undersized drills, missing fiducials, and inadequate stencil aperture ratios for fine-pitch parts. Check your layout against the factory's published capability sheet before release.
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