An EMS (electronics manufacturing services) supplier takes responsibility for turning your design files into finished assemblies: bare board fabrication, component sourcing, SMT and through-hole assembly, inspection, test and packing. Splitting those steps across three vendors is where most schedule risk and finger-pointing comes from — the fab blames the assembler, the assembler blames the paste, and your launch date pays for it.
Xianglong Circuit runs both halves in-house. Rigid, HDI, flex, rigid-flex and metal core boards are built in our own plants, then move directly into SMT and DIP lines for assembly, mixed-technology builds and test. One engineering team owns the DFM review for the board and the assembly, so a footprint that cannot be manufactured is flagged before you cut a stencil.
Assembly orders start from 5 pieces for prototypes and scale to volume runs. Inspection includes AOI and X-ray on BGA and QFN devices, flying probe or ICT on the bare board, and functional test against your test plan where one is supplied. Acceptance follows IPC-A-610 Class 2 or Class 3 depending on your product class.
Components can be supplied turnkey — we quote from your BOM and manage the sourcing and incoming inspection — or consigned by you, in which case we photograph and count incoming reels and report shortages before the line starts. Either way the BOM, alternates and any lead-time risk are confirmed in writing with the quotation.
Founded in Shenzhen in 2008 with a second plant in Dongguan, we are ISO 9001 certified and UL recognized, serving electronics brands in Europe, North America and Japan. Send Gerber, BOM, pick-and-place file and assembly drawing to info@xl-pcb.com for a combined fabrication and assembly quotation within 24 hours.
| Service scope | PCB fabrication, SMT, DIP, mixed technology, test |
| Board supply | Rigid, HDI, flex, rigid-flex, metal core |
| Order size | 5 pcs prototype to volume |
| Component sourcing | Turnkey or customer-consigned |
| Inspection | AOI, X-ray, flying probe, ICT, functional test |
| Acceptance standard | IPC-A-610 Class 2 / Class 3 |
| Certification | ISO 9001, UL, RoHS |
| Files required | Gerber, BOM, pick-and-place, assembly drawing |
| Quotation | DFM report + price within 24 h |
| Shipping terms | FOB Shenzhen, DDP on request |
| Working hours | Mon-Sat 8:30-18:30 (GMT+8) |
A PCB shop stops at the bare board. An EMS supplier also procures components and assembles, inspects, tests and packs the finished board, which means one owner for the whole build and no split responsibility when something goes wrong.
Yes. Send the BOM and we quote turnkey, including alternates where a part is on allocation. If you prefer to consign parts, we inspect and count incoming reels and report discrepancies before production starts.
Prototype assembly starts from 5 pieces. Small runs are quoted with the same DFM review as volume orders; there is no separate engineering charge hidden in the unit price.
AOI and X-ray cover solder joints and hidden BGA/QFN joints, ICT covers nets where a fixture exists, and functional test runs against the test plan you provide. Test coverage is agreed with the quotation, not after shipment.
Gerber or ODB++, BOM with manufacturer part numbers and quantities, pick-and-place (centroid) file, assembly drawing and any test specification. Missing files are listed back to you within one working day.
