Hua Yang, Zeiss launch COSMA-M for chip metrology

Metrology is quietly becoming the new chokepoint in advanced packaging — not lithography. When HBM stacks exceed 12 layers and CoWoS interconnect pitches compress below the micron, the calibration logic of planar-wafer CD-SEM and overlay tools collapses. COSMA-M targets precisely this 3D non-planar measurement void, which in turn forces ASML to re-baseline EUV alignment specs and Lam to tighten TSV etch uniformity tolerances. The compliance architecture deserves scrutiny: a Chinese mechanical platform married to German optical IP is a structural workaround around US BIS export controls. The 2023 ASML EUV restriction precedent warns that if Washington escalates pressure on Berlin, Zeiss's optical core becomes COSMA-M's single largest regulatory liability. On competition, KLA will almost certainly accelerate its 3D metrology roadmap to close the advanced-packaging gap. But the real disruption is subtler: Chinese OSATs like JCET and TongFu now gain metrology-grade measurement access without routing through KLA's US-based service chain — a de-facto de-Americanization of the metrology stack. 12-to-24-month outlook: the metrology market will bifurcate into a Western stack and a hybrid stack ecosystem. AI accelerator demand will elevate metrology to the number-two bottleneck, behind only lithography, by 2026.