More Inspections, Same Blind Spots: The Chip Visibility Problem Explained

AI Summary

Semiconductor Engineering's piece "Closing The Visibility Gap" makes a point that cuts against instinct in chip manufacturing: adding more measurements does not eliminate blind spots, because every measurement technique captures only part of the device. As chips shift from flat 2D layouts to stacked 3D structures and multi-chiplet packages, more critical features end up buried where any single tool cannot see them. The real fix is not more hardware but better integration — combining partial views and being explicit about what remains unverified. For Malaysia, whose semiconductor industry is concentrated in assembly, test and advanced packaging in Penang, Kulim and Malacca, this is not an abstract debate. It describes the exact quality problem sitting on Malaysian factory floors today.

Key Takeaways

• The article's core claim: measurement coverage is not additive. Repeating or multiplying measurements with similar tools leaves the same blind spots in place.
• The problem grows as devices go 3D — stacked dies, through-silicon vias, and chiplet packages put critical features inside the package, beyond the reach of surface-based inspection.
• The direction of travel is from hardware-centric inspection to data-centric inspection: fusing partial views, comparing them against design intent, and inferring what sits in the gaps.
• Malaysia's strength is the backend — assembly, test and packaging — which is precisely where these visibility gaps concentrate, making this a Malaysian competitiveness issue, not just a fab problem.
• AI systems that orchestrate multiple inspection data streams and flag coverage gaps are a practical response, but they inherit whatever the underlying tools failed to measure.

What Happened

Semiconductor Engineering, a specialist publication covering chip design and manufacturing, published an article titled "Closing The Visibility Gap." Its central argument is short enough to state plainly: more measurements don't eliminate blind spots when each view captures only part of the device.

To understand why that matters, some background. Every chip that gets manufactured passes through inspection and metrology — the family