Direct Answer
Aerospace PCB assembly is the PCBA build process for electronics used in aircraft, avionics, satellite, ground support, and other high-reliability aerospace systems. Buyers should treat the RFQ as a process-control document because solder joints, laminate selection, inspection records, and traceability all affect long-term reliability.
Why Buyers Should Confirm This Early
Aerospace programs often combine tight space, vibration, thermal cycling, long service life, and strict documentation. If the quotation only compares unit price and lead time, the buyer may miss risks around moisture sensitivity, component alternates, rework limits, conformal coating, inspection evidence, and lot traceability.
Buyer Checklist
| Check area | Buyer risk | Evidence to request | | --- | --- | --- | | Material and stack-up | Wrong laminate, copper weight, or finish can reduce thermal and mechanical margin. | Approved stack-up, material data, and surface finish note | | SMT process window | Dense boards can suffer tombstoning, voiding, insufficient wetting, or thermal imbalance. | Paste spec, stencil plan, reflow profile, and first article data | | Inspection coverage | Critical joints may be hidden or hard to judge visually. | AOI, X-ray, ICT, FCT, and acceptance criteria | | Traceability | Aerospace customers need lot history after shipment. | Traveler, batch records, deviation log, and outgoing QA report |
RFQ Questions to Ask
- Which laminate, copper weight, finish, and solder alloy are included in the quotation?
- Will first article inspection include AOI, X-ray for hidden joints, and functional test evidence?
- How are component alternates, process deviations, and rework approved before shipment?
- What traceability records will be returned with each production lot?
Supplier Red Flags
- The quote gives unit price and lead time but does not define material, process, inspection, and test boundaries.
- Alternates, rework, deviations, failed tests, and lot traceability do not have an approval path.
- First article release, in-process inspection, outgoing QA, and nonconforming material handling are unclear.
- Critical process promises are verbal rather than backed by a record template that can be returned with the shipment.
How KEEP BEST Connects the Work
For this type of project, buyers should connect PCBA manufacturing services、DFM engineering review、quality management、RFQ review workflow、aerospace PCB requirements、SMT PCB assembly risk guide in one review path so quotation, engineering, quality, and delivery evidence stay aligned.
Practical Recommendation
Ask the supplier to quote the build with the inspection plan, not as a bare assembly price. A stronger response will connect DFM, SMT setup, first article release, test records, and outgoing QA into one controlled path.
FAQ
Is aerospace PCB assembly only about IPC class?
No. IPC class is important, but aerospace sourcing also depends on materials, process window, traceability, rework control, and test evidence.
Should X-ray inspection be required?
It should be considered whenever BGA, QFN, bottom-terminated components, or reliability-sensitive solder joints are present.
What should be attached to the RFQ?
Attach Gerbers, stack-up, BOM, assembly drawing, test requirements, inspection expectations, and any customer-specific release documents.