Can We Reshape PCB Quality? Perhaps with Automated Micro-Sectioning

Apr 07, 2026

Insights from the Technology Pavilion at APEX EXPO 2026 

KEY SUMMARY

Automated micro-sectioning is transforming PCB quality measurement by replacing manual inspection with data-driven metrology. Insights from APEX EXPO 2026 highlight how faster analysis, correlated metrology, and 3D reconstruction improve defect detection, reduce cycle time, and enable smarter manufacturing decisions.

At APEX EXPO 2026, one discussion focused on a foundational issue: how the electronics industry measures PCB quality and how much actionable insight that process can deliver.

In “Automated Spatial Micro-Sectioning: Advancing Metallography and Correlated Metrology,” Geoffrey Leeds of SCAN Laboratories outlined a shift from traditional, manual inspection toward automated, data-driven metrology. The implications span fabrication, supplier validation, and design-for-manufacturing, and use results in:

  • Reduced cycle time
  • Improved readability
  • Faster corrective action

Micro-sectioning is still a cornerstone of PCB validation, providing cross-sectional evidence of plating integrity, microvia structures, and hole quality. But the process is slow, labor-intensive, and highly dependent on operator skill. Conventional workflows --  manual grinding, polishing, imaging, and interpretation -- introduce variability and can delay results by days or weeks. As interconnect density increases and reliability margins tighten, these constraints are becoming more pronounced.

Micro-sectioning is not a lab task; it’s a data pipeline.

Leeds presented an automated workflow in operation at SCAN Laboratories that standardizes grinding, polishing, imaging, etching, registration, and reporting, while retaining expert oversight for validation. The system is compatible with existing IPC test coupons, allowing adoption without redesigning panels or sampling strategies, an important consideration for cost and process continuity.

A notable advantage is the speed and accessibility of data. Results can be generated and shared in near real time, enabling engineers to begin analysis before the full process is complete. This shortens the feedback loop between defect detection and corrective action.

Central to the approach is “correlated metrology”: integrating multiple measurement perspectives to improve confidence in results. While common in semiconductor manufacturing, this method is less mature in PCB fabrication. By tying cross-section images to the exact board location and AOI record, teams confirm they’re measuring the same feature across modalities, boosting confidence and speeding root-cause analysis.

The presentation also highlighted serialized microscopy and 3D reconstruction. Instead of analyzing a single cross-section, sequential imaging enables volumetric reconstruction of structures. This allows evaluation of geometry, alignment, and interactions across the entire feature, not just at a single slice. For advanced designs with tight tolerances and complex failure modes, this shift from 2D inspection to 3D insight is significant.

Insights and improved outcomes from the data

When micro-sectioning outputs are digitized and integrated into engineering workflows, they become a source of manufacturing intelligence rather than static reports. This supports faster design validation, improved process control across facilities, more effective supplier oversight, and stronger root cause analysis.

As the industry invests in automation and smart manufacturing, metrology will remain a strategic capability. Automated micro-sectioning addresses a clear need: reducing variability, increasing throughput, and transforming inspection into usable data.

The trajectory is clear. The future of PCB manufacturing will depend not only on what can be built, but on how precisely and how intelligently it can be measured.