Huawei just told the world it plans to close a five-year technology gap with the most important chipmaker on the planet.

At the IEEE International Symposium on Circuits and Systems (ISCAS) in Shanghai, Huawei unveiled what it calls the Tau Scaling Law and a companion technology called LogicFolding. Together, these proprietary methods aim to achieve transistor density and performance equivalent to 1.4-nanometer chips by 2031. For context, TSMC is targeting mass production of actual 1.4nm chips by 2028. So Huawei is essentially saying: give us three extra years, and we’ll get to the same destination using a completely different road.

The EUV problem, and Huawei’s detour around it

The gold standard process requires extreme ultraviolet (EUV) lithography machines, which are manufactured by ASML in the Netherlands. These machines cost hundreds of millions of dollars each and are the bottleneck through which all advanced chipmaking must pass. Thanks to US export controls, Chinese firms like Huawei and its foundry partner SMIC cannot buy them.

The Tau Scaling Law and LogicFolding represent an attempt to achieve comparable transistor density without EUV lithography. Rather than shrinking transistors the traditional way, which requires increasingly precise light wavelengths to etch smaller and smaller features, Huawei is exploring architectural innovations that stack and fold logic in ways that approximate the density gains of smaller process nodes.

He Tingbo, president of Huawei’s semiconductor division, revealed that the company has already mass-produced 381 chips based on these principles over the past six years.

The gap Huawei is trying to close

The current technology gap between TSMC and Huawei/SMIC sits at roughly five years. TSMC is the undisputed king of contract chipmaking, fabricating processors for Apple, Nvidia, AMD, and essentially every company pushing the frontier of computing performance. Its roadmap to 1.4nm by 2028 builds on decades of incremental process improvements and billions in capital expenditure.

Huawei’s 2031 target for 1.4nm-equivalent density would, if achieved, shrink that gap to about three years.

The qualifier “equivalent” is doing a lot of heavy lifting here. Matching transistor density is not the same as matching performance, power efficiency, or yield rates. TSMC’s process nodes benefit from decades of optimization across the entire manufacturing stack, from design tools to packaging to testing.

SMIC, China’s largest foundry and Huawei’s primary manufacturing partner, is expected to play a central role in producing chips based on these new technologies. No specific production timelines for the new framework were provided beyond the 2031 density target.

What this means for the semiconductor landscape

US sanctions on China’s chip industry were designed to maintain a technological moat. The logic was straightforward: if you can’t buy EUV machines, you can’t make advanced chips, and if you can’t make advanced chips, you can’t build competitive AI hardware or advanced military systems. Huawei’s announcement directly challenges that premise.

The 381 chips already mass-produced using these principles suggest Huawei isn’t starting from zero. But the distance between current production and 1.4nm-equivalent density in 2031 is enormous. Investors in TSMC, ASML, and the broader semiconductor supply chain should treat this as a signal worth monitoring rather than an immediate competitive threat. The real test comes when Huawei moves from conference announcements to production data that independent analysts can verify.