PCB & PCBA Frequently Asked Questions

What is the difference between PCB and PCBA testing?

PCB testing focuses on verifying the bare board’s structural and electrical integrity—checking traces, vias, and layer alignment before components are added. PCBA testing validates the fully assembled board’s performance, confirming that every component functions correctly under real-world operating conditions.

When should impedance testing be performed?

Impedance testing should be carried out during the PCB fabrication stage—before assembly—to confirm that all controlled impedance traces meet design specifications. It’s essential for RF, microwave, and high-speed digital circuits.

What’s the benefit of flying probe testing compared to in-circuit testing (ICT)?

Flying probe testing is fixtureless and ideal for prototypes or small batches, offering flexibility with lower setup costs. ICT, on the other hand, is faster and more suitable for mass production, providing detailed diagnostics for every net and component.

How does functional testing (FCT) ensure product reliability?

FCT simulates real operating conditions—powering up the board, loading firmware, and testing I/O interfaces—to confirm that the final assembly performs exactly as intended. It’s the last step before product shipment to ensure zero functional defects.

What types of reliability tests are available for system-level assemblies?

We perform a full range of reliability tests including burn-in, thermal cycling, vibration, and humidity testing. These simulate long-term use and harsh environments to guarantee durability and stability over the product’s life cycle.

How do you handle testing for high-density or complex boards (e.g., BGA or HDI PCBs)?

We use a combination of X-ray inspection (AXI) and boundary-scan (JTAG) to analyze hidden solder joints and interconnects. This allows non-intrusive diagnostics of fine-pitch components and multi-layer connections without physical probing.

Can testing data be included in the final quality documentation?

Yes. We provide detailed test reports, measurement records, and visual inspection data upon request. These documents are fully traceable and can be used for customer quality audits or regulatory compliance verification.

What international testing standards do you follow?

Our testing processes comply with IPC, ISO, MIL, and IEC standards. All procedures are executed under certified quality systems to ensure repeatability and global acceptance.

Do you offer custom test development for special applications?

Absolutely. Our engineering team can design customized test fixtures, software, and automation scripts based on your test specifications, communication protocols, and performance criteria.

How can I choose the right testing strategy for my project?

The best approach depends on your production stage, complexity, and reliability requirements. For example: 1.Prototype: Flying Probe + AOI + Functional Test; 2.Mass Production: ICT + AOI + Burn-in; 3.High-Reliability Systems: FCT + Environmental + Thermal Cycling.

What files are required for a DFM review?

Gerber, BOM, schematic, and PCB layout files. STEP files are recommended for mechanical checks.

How long does a DFM review take?

Typically 2–4 business days. Expedited reviews available for urgent projects.