The Chinese Chipmaker at the Heart of the U.S.-China Tech War

In a sprawling factory in eastern Shanghai, where marshy plains have long since been converted into industrial parks, China’s most advanced chipmaker has been hard at work testing the limits of U.S. authority.

Semiconductor Manufacturing International Corporation, or SMIC, is manufacturing chips with features less than one-15,000th of the thickness of a sheet of paper. The chips pack together enough computing power to create advancements like artificial intelligence and 5G networks.

It’s a feat that has been achieved by just a few companies globally — and one that has landed SMIC in the middle of a crucial geopolitical rivalry. U.S. officials say such advanced chip technology is central not just to commercial businesses but also to military superiority. They have been fighting to keep it out of Chinese hands, by barring China from buying both the world’s most cutting-edge chips and the machinery to make them.

Whether China can advance and outrace the United States technologically now hinges on SMIC, a partly state-backed company that is the sole maker of advanced chips in the country and has become its de facto national semiconductor champion. SMIC pumps out millions of chips a month for other companies that design them, such as Huawei, the Chinese technology firm under U.S. sanctions, as well as American firms like Qualcomm.

So far, SMIC hasn’t been able to produce chips as advanced as those of rivals such as Taiwan Semiconductor Manufacturing Company in Taiwan, or others in South Korea and the United States. But it is racing forward with a new A.I. chip for Huawei called the Ascend 910C, which is expected to be released this year.

Huawei’s chip is not as fast or sophisticated as the coveted processors from Nvidia, the U.S. chip giant, which the White House has banned for sale in China. SMIC can also most likely make only a small fraction of what Chinese firms want to buy, experts said.