Chip machine-maker ASML reportedly has the power to remotely disable its equipment in TSMC’s fabs, should China invade Taiwan. TSMC is the biggest client of ASML’s EUV lithography systems, which use extreme ultraviolet (EUV) wavelengths to manufacture the highest grade of semiconductors. These chips enable a wide range of use cases, from smart tech like phones and car electronics to (most importantly) AI and military applications.