The Engineer’s Guide to Choosing the Right Electronics Test Service

Designing electronics is a bit like building a spacecraft in miniature. Every trace, solder joint, coating layer, and via has one mission: work flawlessly when it matters most.

But many field failures don’t begin with the schematic—they begin with hidden process issues, contamination, weak interconnects, or materials that were never properly stress-tested.

That’s why selecting the right test service is one of the smartest engineering decisions you can make, but the big question…..which test service is best for you?

Let’s break it down.

Problem; Fighting Intermittent Failures or Corrosion

Test: Ionic Contamination & Ion Chromatography

Some of the most frustrating failures are the ones that appear randomly. Boards pass inspection, pass functional test, and then begin failing weeks or months later in service.

Often the root cause is contamination left behind after manufacture.

Flux residues, fingerprints, cleaning chemistry residues, and environmental particles can attract moisture and create leakage currents or corrosion pathways.

Choose This If You Need:

• Better long-term field reliability
• Cleaner SMT or PCB assembly processes
• Validation after changing cleaning chemistry
• Root cause analysis of corrosion issues

Why It Matters:

Ionic contamination testing gives a fast overview of residue levels, while Ion Chromatography identifies the exact ionic species present—such as chloride, bromide, sodium, or sulfate. That means you’re not guessing where the issue came from putting you in the best position to resolve the issue.

This is one of the highest-value tests available because it can reveal hidden reliability risks before customers ever see them.

Problem: Solder Joints Are Failing or Wetting Looks Inconsistent

Test: Solderability Testing

Even excellent designs can suffer if components or PCB finishes no longer solder properly.

Lead oxidation, storage age, poor plating quality, moisture exposure, or finish degradation can all reduce wetting performance and create weak joints.

Choose This If You Need:

• Incoming component validation
• PCB finish qualification
• Reduced assembly defects
• Supplier quality checks
• Confidence before a production build

Why It Matters:

Solderability testing measures how effectively molten solder wets component leads, pads, and finishes. Poor wetting often leads to opens, cold joints, excessive rework, or early-life failures.

Problem: Your Product Is Designed To Operate In Harsh Environments & Failures Are Unpredictable

Test: SIR Testing & Condensation Humidity Testing

Moisture, voltage bias, temperature, and contamination are a dangerous combination for electronics.

Surface Insulation Resistance (SIR) testing evaluates how well a PCB surface resists electrical leakage under controlled environmental stress, while condensation humidity testing accelerates the environment in a matter of hours, not weeks, providing controlled condensation levels advancing SIR testing even further.

Problem: If You’re Designing High-Density Multilayer Boards & Experiencing CAF Growth

Test: CAF Testing

Conductive Anodic Filament (CAF) growth is a hidden failure mechanism inside multilayer PCBs.

It occurs when moisture, voltage bias, ionic contamination, and weaknesses in laminate materials allow conductive filaments to grow between internal conductors.

Problem: Vias or Through-Holes Crack During Thermal Cycling

Test: HATS²™ Thermal Shock Testing

Many products experience repeated expansion and contraction throughout their life. Power cycling, outdoor temperatures, engine compartments, and industrial environments all create thermal stress.

Decision Matrix

Problem                                      Test Service

Random field failures                   Ionic Contamination & Ion Chromatography

Poor solder joints                         Solderability Testing

Moisture leakage current             Surface Insulation Resistance Testing (SIR)

Hidden multilayer shorts              Conductive Anodic Filament Testing (CAF)

Via cracking / thermal fatigue      HATS²™ Thermal Shock Testing

If you’re unsure where to begin, speak to one of GEN3’s Technical Sales Managers, who can guide you through this process with ease