Verified PCB & PCBA manufacturingSurface-mount assembly
SMT PCB Assembly Services
SMT PCB assembly for fine-pitch, BGA and mixed-component boards with stencil, placement, reflow and inspection planning matched to design risk.
What this service solves
A controlled path from requirements to acceptance
Surface-mount quality depends on the complete process window: land pattern, stencil design, paste deposition, placement, thermal profile and inspection all interact.
Best fit for
- Dense digital or mixed-signal assemblies
- Boards using QFN, BGA or other hidden-joint packages
- Prototype through repeat-production requirements
Scope
Typical project deliverables
The exact scope is frozen in the quotation and approved build documentation.
| Deliverable | Control point | Customer output |
|---|---|---|
| 01 · Stencil and paste-process review | Confirmed before material commitment | Approved assumptions and responsibilities |
| 02 · Programmed placement and polarity control | Confirmed before material commitment | Approved assumptions and responsibilities |
| 03 · Thermal-profile planning | Controlled during manufacturing | Repeatable production instruction |
| 04 · SPI/AOI/X-ray allocation by component risk | Controlled during manufacturing | Repeatable production instruction |
| 05 · First-article confirmation | Verified before release | Inspection, test or shipment evidence by scope |
| 06 · Defect and rework records by agreement | Verified before release | Inspection, test or shipment evidence by scope |
Workflow
How a build moves forward
- 01
Qualification
Confirm product stage, quantities and commercial fit.
- 02
File review
Identify missing data and manufacturability conflicts.
- 03
Quotation
Separate material, fabrication, assembly, test and logistics assumptions.
- 04
Approval
Freeze revisions, alternates and acceptance criteria.
- 05
Build & validation
Manufacture against the approved package and record agreed results.
Risk review
Issues to resolve early
| Risk | Required control |
|---|---|
| Incorrect land patterns | Resolve conflicting inputs in a dated engineering review. |
| Insufficient thermal relief | Record approval ownership and release status before purchase. |
| Poor fiducial or panel design | Define handling, traceability and exception rules in the build package. |
| Hidden-joint packages without suitable inspection | Select inspection and test coverage against the actual failure risk. |
Buyer questions
Frequently asked questions
Can BGA and QFN components be assembled?
Package support must be confirmed against pitch, board design, equipment limits and the available X-ray inspection plan.
Is AOI enough for every SMT board?
No. AOI cannot fully inspect hidden joints under packages such as BGA. Inspection should be selected according to failure risk and joint visibility.
Why is stencil review important?
Aperture design and stencil thickness influence solder volume, bridging, opens and voiding, especially when a board mixes very small and large components.
Next step
Ready for a build review?
Share your project stage, quantity and target date. We will confirm the files, process and testing information needed for an accurate quotation.