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By Karen Freifeld and Fanny Potkin
NEW YORK/SINGAPORE (Reuters) – The U.S. ordered Taiwan Semiconductor Manufacturing Co to halt shipments of advanced chips to Chinese customers that are often used in artificial intelligence applications starting Monday, according to a person familiar with the matter.
The Department of Commerce sent a letter to TSMC imposing export restrictions on certain sophisticated chips, of 7 nanometer or more advanced designs, destined for China that power AI accelerator and graphics processing units (GPU), the person said.
The U.S. order, which is being reported for the first time, comes just weeks after TSMC notified the Commerce Department that one of its chips had been found in a Huawei AI processor, as Reuters reported last month. Tech research firm Tech Insights had taken apart the product, revealing the TSMC chip and apparent violation of export controls.
Huawei, at the center of the U.S. action, is on a restricted trade list, which requires suppliers to obtain licenses to ship any goods or technology to the company. Any license that could aid Huawei’s AI efforts would likely be denied.
TSMC suspended shipments to China-based chip designer Sophgo after its chip matched the one found on the Huawei AI processor, sources told Reuters last month.
Reuters could not determine how the chip ended up on Huawei’s Ascend 910B, released in 2022, viewed as the most advanced AI chip available from a Chinese company.
The latest clampdown hits many more companies and will allow the U.S. to assess whether other companies are diverting chips to Huawei for its AI processor.
As a result of the letter, TSMC notified affected clients that it was suspending shipments of chips starting Monday, the person said.
The Commerce Department declined comment.
A spokesperson for TSMC also declined to comment beyond saying it was a “law-abiding company…committed to complying with all applicable rules and regulations, including applicable export controls.”
The Commerce Department communication — known as an “is informed” letter — allows the U.S. to bypass lengthy rule-writing processes to quickly impose new licensing requirements on specific companies.
Ijiwei, a Chinese media site covering the semiconductor industry, reported on Friday that TSMC notified Chinese chip design companies it would suspend 7 nanometer or below chips for AI and GPU customers beginning Nov. 11.
The action comes as both Republican and Democratic lawmakers have raised concerns about the inadequacy of export controls on China and the Commerce Department’s enforcement of them.
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