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 US 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 US 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.
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