Imec sets world record in superconducting circuits

Summary

At the 2026 Applied Superconductivity Conference, Imec presented the world's first superconducting circuit featuring a density of 3.8 million Josephson junctions per square centimeter and 30-nanometer NbTiN wires. The company claims these results can scale to high-performance computing and data center workloads.

Why it matters

Superconducting logic can significantly reduce energy consumption per signal while reaching CMOS-like densities. This directly addresses the power wall that slows down AI and HPC data centers. The use of standard 300 mm wafer processes and 2.5D/3D integration roadmaps indicates that Imec is positioning this technology not as a laboratory curiosity, but as a manufacturable platform. This approach could reshape the long-term debate on computing architecture.

Highlights

• 3.8 million junctions/cm² and 150 nm junctions across three NbTiN metal layers — a density Imec describes as a world first
• 30 nm superconducting wires, approximately 10 times narrower than traditional niobium-based interconnects
• Built on 300 mm semiconductor processes; 2.5D/3D integration is ongoing. Target audience includes foundries and hyperscalers

Critical take

Every performance claim in the article is softened with phrases like 'could' or 'can.' Since the article is a secondary report on a conference presentation, it provides no benchmark data, comparisons with existing superconducting or CMOS systems, or a timeline. The only real constraint, cryogenic cooling, is acknowledged in a single sentence and then completely ignored. Readers are left with just a density figure and a lot of hype.