PCB Fabrication Data: Gerber Files for China
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This tag covers the manufacturing data you send a Chinese PCB factory — RS-274X Gerber files, Excellon drill files, and the modern unified formats ODB++ and IPC-2581. Sending a complete, correctly exported data package is what separates a clean quote from a fab held for clarification. The big risk is an incomplete export: missing drill file, wrong units, or no fab drawing specifying stackup, copper weight, and impedance control.
When you fabricate in China, the pitfall is assuming the factory will guess your intent from incomplete Gerbers — they'll either query you or default to the cheapest read. We send a full package (Gerber + Excellon + fab notes, or ODB++/IPC-2581) with explicit stackup, finish, and impedance requirements so there's no ambiguity.
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FAQ
Should I send Gerber or ODB++/IPC-2581?
RS-274X Gerber plus an Excellon drill file is universally accepted. ODB++ and IPC-2581 bundle netlist, stackup, and drill data into one file, reducing errors — use them if your factory supports them, but always include a clear fab drawing.
What gets missed most often in a fabrication package?
The drill file, board outline, stackup/impedance notes, and copper weight are the usual omissions. An incomplete package gets held for clarification, so verify the export is complete before sending.
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