Mixed-technology PCB assembly combines surface-mount and through-hole components on one board. The project review must consider the complete sequence, component access, mechanical support and verification requirements, rather than treating the two assembly methods as unrelated line items.
Define the work and deliverable
Identify which components are populated on each side, which require later installation, and what access must remain available between steps. Assembly order can interact with tall parts, heavy connectors, sensitive components, fasteners and test connections. Obtain a review of the actual configuration before approving a process sequence.
Files and requirements to send
- Complete assembly drawings, placement data and BOM covering both surface-mount and through-hole components.
- Mechanical restrictions, component seating requirements and relevant supplier handling or process documentation.
- Any specified installation sequence, inspection requirements and tests that must occur before access is restricted.
Decisions to close before release
| Decision | What to confirm |
|---|---|
| Sequence | Identify dependencies between soldering, insertion, fastening, cleaning, programming and test. |
| Access | Review tool, fixture and inspection access around installed parts and both board sides. |
| Acceptance | Define how each component group and the complete assembly will be checked before release. |
A practical planning example
A tall through-hole connector may obstruct a nearby test point or tool path once installed. If the test is needed before that step, document the intermediate test and the final checks still required afterward. Do not assume that a check performed early covers damage or changes introduced later.
Can SMT and through-hole work be priced separately?
They can be itemized, but compare the complete sequence and shared preparation costs. Ask whether the quote includes the necessary handling, fixtures, inspection, test and disposition work across both methods.
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
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