Starting with the Trump administration, the United States has been tightening the noose around China's high-tech ambitions. But why worry about older chip technology? “28 nanometer” refers to a chip technology commercially used since 2011. But it is a giant in older technology, including chips that regulate power flows in electronics. The importance of older chip technology hit the industry in the face in 2021 as a shortage of those chips prevented manufacturing of millions of cars and consumer electronics.

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