Turnkey & box build
Six stages through one gate: design and DFM support, PCB fabrication, tooling, injection moulding and sheet metal, component sourcing, PCBA production, and final assembly with export packing. Nine SMT lines and 4–5 DIP lines run in our own plant rather than being stitched together from subcontractors.
What we take on
A turnkey quotation only means something if the boundary is written down. This is where our scope ends and where yours begins, stage by stage. the deliverable column is what you receive, not what we do.
Gerber, BOM and pick-and-place reviewed by an engineer before quoting: drill, annular ring, panelisation, paste apertures and the stackup are checked and returned as a written DFM report. Deliverable: a released Gerber set and the stackup drawing.
1–58 layers laminated in-house, 0.4–3.2 mm thick, to 600 × 1200 mm, with impedance held to ±10% as standard. Deliverable: bare boards with electrical test and the coupon record.
Enclosure tooling, injection moulding and sheet metal are arranged as part of the same programme, so the board outline and the mechanics are not two separate conversations. Deliverable: mouldings and sheet-metal parts to the approved drawing.
The BOM is bought from authorised distribution by default, with lifecycle status checked at quotation and every substitution proposed in writing. Deliverable: a kit with date-code traceability and material declarations.
SMT and DIP assembly, selective soldering, cleaning, coating and test on nine SMT lines and 4–5 DIP lines. Deliverable: assembled and tested boards with ICT/FCT records.
Final assembly, cable harnesses, labelling, function test at unit level and dry-pack export packing. Deliverable: the boxed product with CoC, packing list and the documents your customs broker asks for.
Who buys the parts
The commercial model decides who carries the working capital, the obsolescence risk and the customs value. All three run on the same lines at the same quality gates, with no MOQ, one piece or ten thousand.
You ship the kit; we fabricate the boards, assemble, test and pack. Customer-supplied material is booked in against your asset account with a dated reconciliation, and shortages are reported before the line stops rather than after.
We take the lines that carry the schedule risk: multilayer laminates on a 6–8 week lead, ceramic capacitors at 20–50+ weeks and automotive microcontrollers at 52+ weeks. You supply the rest. The split is fixed in writing line by line before the first order.
One purchase order covers fabrication, sourcing, assembly, coating, box build and export packing. Sourcing runs through a pool of 5,000+ approved suppliers on authorised distribution channels, with no broker or open-market purchasing without your written approval.
BOM risk
Material is where turnkey projects slip. The rule we work to is that the sourcing decision is documented before it is made, not explained after it causes a delay.
Conformal coating and potting
Four coating materials and two potting systems, all applied selectively to IPC-CC-830B so that connectors, test points, terminal blocks and press-fit holes stay serviceable. Depth and cure settings live in the process file for the assembly, not in a marketing table.
| Material | Thickness | Used where | Notes |
|---|---|---|---|
| Acrylic | 25 – 75 µm | General indoor assemblies | The easiest scheme to rework; the usual first specification |
| Silicone | 50 – 210 µm | Wide temperature swing, outdoor housings | Thickest film of the four; keeps flexibility across the range |
| Urethane | 25 – 75 µm | Solvent and chemical exposure | Chosen where cleaning agents or process chemistry reach the board |
| Parylene | 5 – 50 µm | High-impedance and RF surfaces | Thinnest film; used where coating must not disturb connector fit |
| Epoxy potting | Set in the process file | Full encapsulation of a power or sensor module | Adds mechanical support as well as environmental sealing |
| Polyurethane potting | Set in the process file | Encapsulation that keeps some compliance | For assemblies that expand against a metal housing |
On the coating line
Coating is a programme on a machine, not a dip. The Nordson Select Coat SL-940 applies the film along a path defined per board, with masking and local protection where the assembly has to remain serviceable.
Box build
Box build is the stage most quotations leave vague. Ours is four defined operations, each with its own record, ending in a sealed dry-pack carton.
Board to chassis, standoffs, thermal interface, gaskets and fasteners torqued to the drawing, with the unit serial number applied and recorded.
Cut, crimp, label and continuity-test harnesses built to your drawing, so the unit ships with the interconnect rather than leaving it to the installer.
Brackets, panels and mounting plates produced to the approved drawing and checked against the first article before the batch is accepted.
Unit-level function check, labelling, accessories, then dry-pack: metallised static-shielding bag, moisture-barrier bag, desiccant and humidity indicator card.
Export and documents
Turnkey only works if the shipment clears customs without a follow-up email. Documents are prepared per lot, packing is specified for moisture and static, and the freight mode is chosen against weight and volume rather than habit.
Your design, your property
Nobody sends a real Gerber set to a supplier they have not papered. Ours is the NDA, non-use, non-disclosure and non-circumvention, and it is signed before files move in either direction.
Engineering review & quotation within 24 hours
Tell us which stages you want us to take and which stay with you. The reply is an engineering review and a quotation for the whole package, fabrication, material, assembly, coating, box build and freight, inside one working day.
Send your Gerber, BOM or a plain description. An engineer, not a sales script, reviews it and replies within one working day. NDA on request.
