U.S. Orders TSMC to Halt AI Chip Shipments to China Amid Escalating Tech Export Controls

The U.S. government has directed Taiwan Semiconductor Manufacturing Co. (TSMC) to cease shipments of advanced chips used in artificial intelligence (AI) applications to Chinese customers as of Monday. According to a source familiar with the order, the U.S. Department of Commerce issued a notice to TSMC restricting the export of specific advanced chips, including 7-nanometer designs and below, often deployed in AI accelerators and GPUs, to Chinese entities.

This new export restriction follows recent revelations by TSMC regarding one of its chips found within a Huawei AI processor. Tech Insights, a technology research firm, had disassembled the Huawei processor and discovered TSMC’s involvement, potentially indicating an export control breach. Huawei, which is on the U.S. restricted trade list, is required to secure special licensing for any U.S.-derived technology imports. Such licenses are unlikely to be granted if they would benefit Huawei’s AI capabilities.

In response to the U.S. directive, TSMC has begun notifying Chinese clients affected by the suspension of AI and GPU chip shipments, including Sophgo, a China-based chip designer that used similar TSMC technology in a Huawei product. It remains unclear how the chip ended up in Huawei’s Ascend 910B AI processor, one of China’s most advanced AI chips.

The latest U.S. clampdown comes as lawmakers on both sides of the aisle have voiced concerns about the efficacy and enforcement of export controls on China. In recent years, the Commerce Department has issued similar restrictions to companies like Nvidia, AMD, and several chip equipment manufacturers to limit AI-related technology exports to China. Restrictions initially introduced via “is-informed” letters, like those now sent to TSMC, were later formalized into broader regulatory rules affecting additional companies.

This move reflects Washington’s continuing strategy to limit China’s access to advanced AI and chipmaking technologies. The Biden administration has drafted new export control rules targeting Chinese chipmaking and related companies and aimed to update the Commerce Department’s entity list, which would include over 120 Chinese companies. However, despite these plans, the proposed rules remain delayed, missing anticipated release dates earlier this year.