The companies will now need to obtain licences to buy equipment for China, affecting sales and potentially aiding Chinese manufacturers

The United States is making it more difficult for chipmakers Samsung and SK Hynix to produce chips in China by revoking authorisations that allowed the companies to receive American semiconductor manufacturing equipment there, according to the Federal Register.

The US Commerce Department had given the companies exemptions to sweeping restrictions created in 2022 on the sale of US semiconductor equipment to China.

The companies will now need to obtain licences to buy the equipment for China. The federal filing also included Intel among the companies that lost their authorisation for China, but Intel sold its Dalian China unit in a deal that was finalised earlier this year.

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