China makes progress in 3-nm chips without advanced lithography tools
Chinese researchers have made early progress in developing sub-3nm semiconductor processing nodes using older deep ultraviolet (DUV) lithography, circumventing US restrictions on advanced extreme ultraviolet (EUV) tools. This breakthrough by the Chinese Academy of Science…
Intelligence analysis by Gemini 2.5 Flash
Amid US export restrictions blocking access to state-of-the-art EUV lithography machines, China's state-backed Chinese Academy of Sciences (CAS) has reported early success in developing sub-3nm chip technology using less advanced DUV tools. This development, though far from mass production, signals China's determination to forge its own path in advanced semiconductor manufacturing.
Imagine making tiny, super-fast brains for computers, like building a very detailed LEGO castle. Normally, you need a special, super-precise tool (EUV) to make the smallest pieces. But China is trying to build these tiny brains using an older, less precise tool (DUV), like using regular LEGOs to make something super intricate. They've made some early progress, showing they might be able to do it, even if it's not ready for everyone to use yet.
Analysis
The article highlights China's significant, albeit early, progress in developing sub-3nm semiconductor technology. This advancement is particularly notable because it has been achieved without the use of advanced extreme ultraviolet (EUV) lithography tools, which are currently restricted from export to China due to US sanctions. The Chinese Academy of Sciences (CAS) is at the forefront of this effort, demonstrating China's strategic push for self-sufficiency in critical technology sectors.
Chinese Academy of Sciences
The Chinese Academy of Sciences (CAS), a state-backed institution, has been identified as the key player behind this breakthrough. Specifically, its Institute of Microelectronics (IMECAS) has established a preliminary gate-all-around (GAA) device development path. This indicates a concerted national effort to overcome technological bottlenecks imposed by international trade restrictions.
The work at IMECAS involves the early integration of stacked nanosheet-channel GAA CMOS transistors. This technical achievement, as described by veteran Ye Tianchun, represents a "new early-stage MOS transistor process path for China’s sub-3-nm advanced manufacturing." While the results are promising, the article emphasizes that this is still far from mass production, suggesting a long road ahead for commercial viability.
3-nm Chips
The focus on 3-nm chips is critical because this node represents the cutting edge of semiconductor technology, essential for the most powerful processors used in AI, high-performance computing, and advanced mobile devices. Achieving progress at this level without EUV tools is a testament to China's innovative capacity under duress. The global semiconductor industry largely relies on EUV for manufacturing chips below the 7-nm node, making China's alternative approach a significant strategic move.
This development suggests that China is actively tracking and attempting to replicate the technological road map of global leaders like TSMC and Samsung, albeit through different means. The ability to develop such advanced nodes, even in early stages, could eventually reduce China's vulnerability to external supply chain disruptions and sanctions, fostering greater technological independence.
DUV Lithography
The core of China's strategy lies in leveraging less advanced deep ultraviolet (DUV) lithography tools to achieve results typically associated with EUV. DUV machines are older generation technology compared to EUV, which uses shorter wavelengths of light to etch finer patterns onto silicon wafers. The US export control rules specifically bar ASML, a Dutch equipment giant, from selling its state-of-the-art EUV machines to Chinese clients, forcing China to innovate with existing or less advanced equipment.
By demonstrating a path to sub-3nm manufacturing using DUV, China is showcasing its engineering prowess and determination to overcome technological barriers. This approach, if scalable, could fundamentally alter the dynamics of the global semiconductor industry, offering a viable alternative to the EUV-centric manufacturing paradigm and potentially mitigating the impact of future technology embargoes.
Key points
- Chinese researchers have made early progress in developing sub-3nm semiconductor processing nodes.
- This achievement utilizes older deep ultraviolet (DUV) lithography, bypassing US restrictions on advanced extreme ultraviolet (EUV) tools.
- The breakthrough was made by the state-backed Chinese Academy of Sciences (CAS), specifically its Institute of Microelectronics (IMECAS).
- The institute has established a preliminary gate-all-around (GAA) device development path using DUV tools.
- The technology is currently "far from mass production" but demonstrates China's alternative path to advanced chipmaking.
This breakthrough could enable China to significantly advance its domestic chip manufacturing capabilities, reducing its reliance on foreign technology and bolstering its position in the global tech landscape. It could also spur further innovation in alternative chipmaking methods, potentially diversifying the global semiconductor supply chain.
While promising, the development is still in its early stages and "far from mass production," meaning significant challenges remain in scaling up and achieving commercial viability. The continued reliance on older DUV technology might also lead to higher costs or lower yields compared to EUV-based manufacturing, potentially limiting its long-term competitiveness.
