PCBA

Turnkey PCBA Manufacturing in One Factory

Most PCBA problems are not manufacturing problems in the narrow sense. They are coordination problems. A bare board arrives from one supplier, components from another, the assembly is done by a third, and when the finished board fails test there is no shared record that says where the fault came from. Turnkey manufacturing exists to remove that gap.

What a turnkey order actually covers

• Design file review for manufacturability, including panel utilisation, layer stack-up, copper weight and component spacing.
• Bare board fabrication from 1 to 24 layers, in FR4, high Tg laminate, heavy copper, aluminium or metal core as the application needs.
• Component sourcing through authorized and franchised distribution, with BOM cleanup, equivalent part identification and incoming inspection against the approved vendor list.
• Assembly: stencil and programming setup, SMT placement, wave or selective soldering for through-hole content, cleaning and rework.
• Test and finishing: automated optical inspection, X-ray for hidden joints, functional test, conformal coating, box build and packaging.

Why the chain being unbroken matters

When fabrication and assembly sit in the same supply chain, a board that is marginal for the process is caught before it is ordered rather than after it fails. Copper weight, surface finish, layer count and panel design all affect assembly yield, and those decisions are made upstream. It also means a schedule can be built from one material plan: long-lead components are identified and ordered first, bare board capacity and placement capacity are booked together, and progress is tracked as separate milestones instead of a single percentage that hides which step is late. Material traceability runs from incoming inspection to the finished assembly, which is what allows a field failure to be investigated with actual production records.

Quality systems and documentation

The regime a programme runs under depends on what the product is: an industrial assembly is built and inspected to the acceptance class agreed at quotation, while medical and automotive work brings additional documentation and change-control requirements that are set out on the quality assurance page. For export programmes the documentation package can include material declarations for RoHS and REACH, lot traceability records, and inspection and test reports in English. Confidentiality is handled under agreement, with design data, schematics, Gerber files and BOMs held for the project only and access limited to the engineers and production staff who need them.

How a turnkey order starts

Send the Gerber files, the bill of materials with manufacturer part numbers and the intended quantity; anything that affects cost or yield is raised before the quotation, and the quotation shows the cost broken into its parts. Two details are worth sending with the enquiry even when they are not final: the expected production volume, so the material is priced on the right quantity, and any acceptance class or test specification the product has to meet.

PCBA capabilities by category

The pages below cover the individual stages and product types that make up a turnkey PCBA order. Each one goes into the process and the design rules for that topic rather than repeating the general description above.