What is the minimum order quantity (MOQ) for custom PCBs?
There is no hard MOQ. We support 1-piece prototypes and scale smoothly to mass production of tens of thousands of panels per month. Prototype and volume orders run on the same production lines, so design-to-volume transfer is seamless.
How fast can I get PCB samples?
Double-sided samples ship in 2–3 working days, multilayer samples in 5–6 working days. Special boards and HDI require about 2 weeks. Volume lead times: 7–8 days for double-sided, 8–10 days for multilayer.
Which files do you need for a quotation?
For bare boards: Gerber RS-274X (or ODB++), a fabrication drawing, and stack-up requirements if impedance control is needed. For PCBA: Gerber files, BOM in Excel, pick-and-place file and assembly instructions. Every quotation includes a free DFM report.
What certifications does Xianglong Circuit hold?
ISO 9001 quality management certification, UL recognition, and workmanship to IPC-A-600 Class 2 and Class 3. Both plants run under ERP with full traceability from material lot to shipment.
Do you support turnkey PCBA assembly?
Yes — component sourcing, SMT and DIP assembly, AOI, X-ray inspection for BGA, in-circuit test, functional test and conformal coating. Consigned assembly is also welcome if you prefer to supply components.
Can you control impedance? To what tolerance?
Yes. Impedance-controlled designs are verified with TDR coupons on a CMI-900 system for every production lot. Standard tolerance is ±8%; tighter tolerances are available after engineering review.
What are your finest line width and smallest hole?
3 mil (75 µm) minimum line width and spacing, 0.20 mm minimum mechanical drilling, and laser microvias down to 0.12 mm on HDI constructions up to 3rd order.
Which countries do you ship to?
We export regularly to Europe, the Americas, Japan and Asia-Pacific via DHL, FedEx, UPS and air/sea freight, with complete export documentation.
Can we audit your factory?
Absolutely. We welcome onsite audits at our Shenzhen office or Dongguan factory, as well as virtual audits via video call. Contact us to schedule.
