SMT assembly places and solders surface-mount components on a printed circuit board. For engineering and purchasing teams, the key decisions are the population data, the physical package mix, the soldering constraints and the evidence required to accept the assembled boards.
Define the work and deliverable
List which sides of the board are populated and identify packages that require special attention. Dense placement, tall components, unusual connectors and components with hidden joints can create different assembly or inspection requirements. Obtain a project-specific review of the actual layout and component documentation instead of relying on a general “SMT capable” label.
Files and requirements to send
- BOM and component placement data generated from the same released design revision.
- Top and bottom assembly views with polarity, orientation, no-fit components and any mechanical restrictions.
- Panel information if already defined, component packaging details for supplied material, and any documented soldering restrictions.
Decisions to close before release
| Decision | What to confirm |
|---|---|
| Placement data | Confirm the coordinate origin, units, board side and rotation conventions before machine preparation. |
| Process preparation | Resolve stencil, panel, support and component-handling questions against the released files. |
| Inspection coverage | Identify visible and hidden joints, proposed inspection methods and records required for exceptions. |
A practical planning example
A connector whose outline is symmetric may still have a critical pin-one orientation. If the drawing and placement export disagree, correcting the rotation after a build is much more disruptive than resolving it during file review. Include an unambiguous assembly view for parts whose orientation cannot be inferred from the footprint.
Can very small or fine-pitch parts be included?
Supply the exact part numbers, package drawings and relevant layout details for review. Minimum package dimensions, pitch limits and suitable inspection coverage require confirmation for the manufacturing site and process; no numeric limit is claimed here.
Compare the complete proposal
Ask for the included work, exclusions, setup charges, material responsibilities and schedule dependencies in writing. Use the quote comparison checklist to keep the same configuration and acceptance scope across offers.
Confirm project fit
[NEEDS CLIENT INPUT]: verified manufacturing site, relevant process limits, available equipment, certificates, MOQ and committed lead times for this service. The requirements above are a project-planning guide; availability must be confirmed against your actual files.
Related work in your build
Prepare the RFQ checklist, review quality and project fit, or browse all services.