THE CHIP WARS: Japan Halting Photoresist To China? “I haven’t been able to verify this yet, but according to China Observer, ‘Japan’s Ministry of Economy, Trade, and Industry may have escalated export controls on November 20-21, adding 12 types of core semiconductor materials and related services to its ‘End User List,’ placing about 110 semiconductor-related entities from mainland China under heightened scrutiny. Mainland China is more than 60% reliant on imports for photoresist, with ArF/EUV almost entirely dependent on Japan and the Netherlands.’