PCB Quality Control
Build the quality requirements into your fabrication order—not just the final inspection. Define the material, process checkpoints and release evidence for your bare boards.
Quality starts before the board is made.
PCB quality control connects a released fabrication specification with inspections and records at selected manufacturing stages. Bare-board acceptance guidance, such as IPC-A-600, addresses board conditions; it is not a substitute for a complete order specification. [S01]
For your GlobalWellPCB project, begin with the features that matter most: a controlled stackup, plated holes, fine copper geometry, mechanical fit or a defined electrical test. Use the quality plan to state who approves each requirement and what happens when a result is outside the agreed limits.
Specify the checkpoints that protect your design.
Use this planning matrix to discuss a build-specific control plan. The checks below are proposed review topics, not a claim that every test is included in every order.
Scroll the table horizontally to see all columns.
| Review area | What to evaluate | What to agree |
|---|---|---|
| Incoming materials | Laminate identity, copper specification, supplier records and lot linkage. | List permitted substitutions and the approval route. |
| Inner-layer construction | Copper pattern, layer identification and relevant dimensional features. | Identify critical features before lamination obscures them. |
| Drilling and plating | Hole type, finished dimensions and plated interconnection requirements. | State any coupon or microsection evidence required. |
| Outer layers and finish | Conductor geometry, mask registration, legend and surface-finish requirements. | Use the approved drawing and applicable acceptance criteria. |
| Final verification | Dimensions, visual condition and the agreed continuity/isolation test. | Add impedance or other special tests as separate requirements. |
| Packing and traceability | Board revision, lot identification, handling and packing instructions. | Specify record retention and shipping-document expectations. |
Tell us which features need inspection, your sampling requirements and the reports you need. We will confirm these details in your quotation.
From a clear requirement to a documented decision.
- 01
Freeze the baseline
Resolve conflicts among artwork, drill files, drawings and purchase-order notes. Keep one approved revision and a clear list of exceptions.
- 02
Agree the control plan
Assign the inspection stage, method, sample basis, limit and required record for each critical characteristic.
- 03
Resolve nonconformities
Separate suspect material, record the finding and obtain the authorized disposition. Do not silently change limits to turn a failure into a pass.
- 04
Review the release package
Match the approved results and any accepted deviations to the shipment lot. Carry approved changes into the repeat-order baseline.
A useful record connects the result to the board.
Ask for a release package sized to your risk and purchasing requirements. A report title alone does not tell you which revision, quantity or test conditions it covers.
- Identity
- Part number, drawing revision, order or lot identifier, and the inspected quantity.
- Acceptance basis
- Agreed standard and revision, product class where applicable, drawing limits and approved deviations.
- Inspection evidence
- Measured characteristics, method, sample locations and pass/fail disposition for the agreed checks.
- Release status
- Open issues, reinspection records and the person or function authorized to release the lot.
A single test is not a complete quality plan.
A bare-board electrical result does not establish assembly quality or transmission-line performance. Coupon impedance and destructive sectioning answer different questions and should be ordered explicitly when needed. Their results must remain tied to the represented lot and sampled structures. [S14] [S17] [S20]
PCB Quality Control FAQs
Find answers about inspection methods, reports and approvals before placing your order.
Is PCB quality control the same as PCBA quality control?
No. This page concerns the unassembled board. Assembly adds component identity, placement, soldering and powered-operation requirements, so its control plan needs additional checks. [S01] [S02]
Does a quality plan automatically mean every board receives every test?
No. Identify which checks apply to every unit and which use an agreed sampling plan. State the lot definition, sample selection and response to a failure before production.
Can an IPC class replace my fabrication drawing?
Treat the agreed acceptance document and class as part of the order, alongside the drawing and special requirements. Resolve conflicts explicitly rather than leaving the manufacturer to infer priorities.
How should a material substitution be handled?
List approved alternatives or require written approval before use. Record any effect on the stackup, qualification evidence, fit or required electrical verification.
What should happen after a failed check?
Define containment, investigation, disposition and reinspection. Repeating a measurement until one result passes is not an adequate release rule.
Which quality documents should I request with the quote?
Start with the drawing revision, required inspection report fields, test scope, lot traceability and any certificate-of-conformance wording. Ask for additional evidence only where it serves a stated requirement.
Technical references
- [S01]IPC / Global Electronics Association — Electronics certification programs
- [S02]IPC — J-STD-001 and IPC-A-610 have complementary roles
- [S14]Mycronic / atg — A9 bare-board flying-probe system
- [S17]Polar Instruments — Test coupons, AP124
- [S20]Struers — Metallography of microelectronics
Explore the inspection and testing references below. Include the applicable standards, acceptance criteria and required records with your enquiry so we can confirm the inspection plan for your board.