Tau Law Emerges: Huawei Charts a Third Path for the Semiconductor World
For half a century, the global semiconductor industry has followed an iron law: "make things smaller." From the moment Gordon Moore, one of Intel's founders, proposed Moore's Law, the chip industry embarked on an irreversible path: transistors get smaller, computing speeds get faster. However, as transistor dimensions shrink to just a few dozen atoms wide, physical limits and economic burdens have driven this traditional path into a dead end. At this critical juncture, Huawei stepped forward and declared: enough, let's change direction.
On May 25, 2026, at the International Symposium on Circuits and Systems hosted by the Institute of Electrical and Electronics Engineers (IEEE), He Tingbo, Huawei's board member and president of the semiconductor business unit, formally unveiled the "Tau (τ) Law," proposing "time miniaturization" as a new guiding principle for semiconductor evolution, replacing "geometric miniaturization." This is not only a technological declaration by Huawei but also the first time a Chinese company has proposed a systematic industrial guiding principle in the global semiconductor field, marking China's transition from a follower to a player at the forefront.
From "Slimming Down" to "Racing Against Time": Redefining Chip Design Thinking
Traditional Moore's Law is akin to building denser buildings and narrower roads in a city, hoping to improve efficiency by shortening paths. But when roads become extremely narrow, traffic jams, electron loss (quantum tunneling effect), and dual physical and economic barriers arise. Huawei's approach: no longer obsess over "slimming" transistors, but rather "racing against time" for signals. This is like building viaducts, setting up express lanes, and optimizing traffic lights in a congested city to make traffic flow smoother, rather than simply narrowing building spacing.
This is not mere concept hype. He Tingbo revealed that over the past six years, based on the Tau Law, Huawei has successfully designed and mass-produced 381 chips spanning smartphones, AI computing, communications, and more. The upcoming "Kirin 2026" smartphone chip, to be released this autumn, will be the first to fully adopt logic folding technology, expanding from single-layer to dual-layer, achieving a 53.5% increase in transistor density, a peak P-core frequency of 3.1 GHz, and a 41% improvement in energy efficiency. A longer-term goal: by 2031, high-end chips based on the Tau Law will achieve transistor density equivalent to that of a 1.4nm process.
The image shows a conceptual chip design, illustrating the evolution from traditional process to time miniaturization.
The Foundation of the Tau Law: Huawei's Extreme Investment and Technological Breakthrough
Why does Huawei dare to set a "new benchmark" for the semiconductor industry? The answer lies in decades of sustained high-intensity investment. On March 31, 2026, Huawei released its 2025 annual report: full-year revenue of 880.9 billion yuan, net profit of 68 billion yuan, R&D investment of 192.3 billion yuan, accounting for approximately 21.8% of revenue, a ten-year high. This means that for every 5 yuan earned, over 1 yuan is invested in technology R&D. Communications expert Liu Xingliang commented that this R&D ratio is rare globally.
HiSilicon, founded in 2004, faced external blockades after 2020, with its advanced process path interrupted. But Huawei did not stop: design continued as usual, and R&D investment increased rather than decreased. In 2023, the Kirin 9000S returned; in 2025, the Kirin 9030 Pro achieved mass production. He Tingbo admitted that after the 9030 Pro, the original route entered a "saturation zone" for performance, with diminishing marginal returns from further stacking. The Tau Law, at this juncture, opened a new channel for Huawei: "not fighting over process but over architecture."
Meng Wanzhou, Huawei's rotating chairperson, wrote in the 2025 annual report: "The mountain has been crossed, but the dust has not yet settled; we spur the horse and move forward with renewed vigor." She emphasized that doing subtraction well is to better perform multiplication; clenching a fist now is for a more powerful punch later. The Tau Law is precisely Huawei's "punch" after "clenching the fist" — not striking in all directions, but concentrating efforts on the main track of semiconductors to tackle the hardest nuts.
From "Huawei's Solution" to "Industry Consensus"
Currently, globally, apart from Huawei, few other companies have proposed similar systems. The reason is not complicated: long-term ultra-high-intensity basic R&D investment is unaffordable for most companies; and Huawei's predicament of supply cutoff also gives it the urgency to switch lanes and overtake. The combination of sustained investment and special circumstances has spawned a moment for a Chinese company to redefine the rules.
In her speech, He Tingbo clearly stated: "The future must belong to open cooperation. Under the path of the Tau Law, we look forward to working closely with global scientists, engineers, and industry partners to jointly promote the sustainable development of the semiconductor and electronics industries." Semiconductors have the most finely divided global supply chain; no single company can cover all links. Whether the Tau Law can grow from a "Huawei solution" into an "industry consensus" depends on whether the global academic and industrial community is willing to embark on this new track together. It needs to prove to the entire industry that "time miniaturization" is not a proprietary skill of one company but a replicable and scalable general path; at the same time, it must coordinate upstream and downstream resources in a complex international environment to complete the full cycle from theory to mass production.
Conclusion: The Historical Significance of the Third Path
Over the past half-century, the global semiconductor industry has had only two guiding principles — Moore's Law and Dennard scaling, both originating from U.S. companies. They have defined the direction of the chip industry for decades. Now, during the window when Moore's Law is slowing, a third law has been proposed by a Chinese company. It not only provides another feasible path for the industry but also moves China's semiconductor industry from a follower to a player at the forefront. In the future, ordinary consumers will directly feel the performance leap in the new autumn smartphones.
