German semiconductor startup Quantum Diamonds invests €152 million in Munich production site as its quantum diamond microscopy enters AI chip defect detection

German semiconductor startup Quantum Diamonds has announced a €152 million investment in a new production facility in Munich, Bavaria, with the first phase opening in July 2026. This move marks a critical transition from laboratory research to industrial manufacturing for the company's core product: "quantum diamond microscopes," which use atomic defects in synthetic diamonds to detect internal flaws in multi-layered AI chips without damaging them.

As AI chip architectures become increasingly complex, traditional inspection methods struggle to identify microscopic internal errors, leading to lower yields and higher costs. Quantum Diamonds' technology locates these defects by measuring weak magnetic fields within the chip. According to the company, the method has been tested with nine of the world's ten largest semiconductor manufacturers, including TSMC and Samsung. Since April 2026, the first systems have been installed and operational at Eurofins EAG Laboratories in California and Integrated Service Technology (iST) in Taiwan, indicating that the technology has moved beyond the research phase into actual industrial application.

The funding structure reflects European industrial policy's emphasis on local supply chain security. Of the €152 million investment, €91 million comes from a financing mix: €15 million from venture investors like World Fund, and €76 million provided by the German federal government and the State of Bavaria under the European Chips Act. Previously, Quantum Diamonds had considered relocating to Arizona, USA, but a subsidy rate of approximately 50% ultimately kept the startup in Germany. Daria Saharova, Managing Partner at World Fund, stated that the company has the potential to become "Europe's next ASML," although it currently lags significantly behind the Dutch lithography giant in scale and technological maturity.