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Semiconductors have long been present in all aspects of modern-day life. The global economy is powered by billions of microscopic transistors that are carved onto silicon wafers, which are used in several devices, including smartphones, cloud servers, automobiles, and medical devices. The basic principle is straightforward: the more compact these parts are, the more energy-efficient and powerful the final products are. However, making these tiny parts smaller requires very advanced manufacturing methods, especially lithography systems that can work with light wavelengths much shorter than what we can see.
For decades, China has allocated vast financial and institutional resources to the development of a self-sufficient semiconductor ecosystem. The objective has been to establish long-term technological independence and decrease dependence on foreign technology through the implementation of state-backed initiatives and substantial private investments. Nevertheless, one critical bottleneck continues to exist: advanced lithography, despite the extraordinary progress made in multiple segments of the supply chain.
How Modern Lithography Machines Actually Work
One of the most complex engineering successes in human history is extreme ultraviolet (EUV) lithography, which is the foundation of modern semiconductor manufacturing.
The procedure starts with the firing of two precision-timed pulses by a high-power carbon dioxide laser at microscopic droplets of molten tin. The droplet is flattened into a thin disk by the first pulse, while the second pulse converts it into plasma at temperatures exceeding hundreds of thousands of degrees. This plasma emits EUV radiation at a wavelength of only 13.5 nanometers, which is significantly shorter than visible light and is necessary for the etching of ultra-small transistor features.
A stable light source is produced by repeating this process tens of thousands of times per second. However, the generation of EUV radiation is only the beginning.
No conventional material can effectively transmit EUV radiation, rendering traditional lenses obsolete. Rather, engineers rely solely on multi-layer mirrors, which are each made up of dozens of alternating molybdenum and silicon layers that are deposited with atomic-level precision. The EUV beam is reflected and shaped by these mirrors, which then project the circuit pattern onto a silicon substrate after passing through a series of intricate optical stages.
Air absorbs EUV radiation almost immediately, requiring that the entire optical system function in a near-perfect vacuum. Even microscopic vibrations or temperature fluctuations can disrupt the process, requiring strict environmental control.
At the same time, the mechanical subsystem is equally remarkable. The wafer stage aligns precisely with the reticle (mask) and moves with sub-nanometer precision, which is less than the width of a single atom. Real-time software coordinates hundreds of thousands of components into a unified system, calculating positioning adjustments at astonishing speeds.
A machine that is approximately the size of a double-decker bus, weighs tens of tons, and costs well over $150 million per unit is the outcome. It is more than just a tool; it is a unified platform that incorporates a comprehensive ecosystem of computation, engineering, and physics.
Why Lithography Cannot Be Built by a Single Company
One of the most critical realities of modern semiconductor manufacturing is that no single company, or even country, can independently build a comprehensive EUV system.
ASML is mainly a system integrator, overseeing a vast global network of specialized suppliers. Each critical subsystem requires a high degree of expertise that has been acquired over the course of decades, and they originate from different parts of the globe.
Ultra-precision surface refining at the atomic level is necessary for optical modules. Mastery of plasma physics and high-energy engineering is necessary for the operation of laser systems. Extreme purity and stability are essential for vacuum systems. Software must be capable of managing millions of operations per second with a near-zero tolerance for error.
Each component is indicative of a highly specialized field, frequently underpinned by extensive research and substantial investment. The development of EUV technology necessitated billions of dollars in funding and spanned more than two decades.
China’s greatest obstacle is precisely this distributed innovation model.
China’s Progress: Strong Foundations, Critical Gaps
China has made considerable progress in semiconductor manufacturing, particularly in the development of mature process nodes and supporting apparatus.
In certain segments, domestic companies have progressively replaced foreign suppliers by expanding rapidly in areas such as etching, deposition, and chemical processes. As part of a broader initiative to achieve supply chain independence, these organizations are acquiring momentum.
Deep ultraviolet (DUV) lithography, in combination with a variety of patterning techniques, has been used by China’s foremost foundries to manufacture semiconductors in the 7-nanometer class at the fabrication level. This method compensates for the absence of EUV tools, but it comes at a cost: increased production expenses, decreased yields, and increased complexity.
Lithography continues to be a critical weakness, despite these developments. China continues to rely heavily on foreign technology for advanced systems, particularly EUV machines, which are subject to strict regulation.
The Effects of Export Controls and Sanctions
China’s semiconductor trajectory has been substantially influenced by geopolitical tensions. China’s access to advanced chipmaking equipment and critical components has been restricted by the United States and its allies.
Mirrors, laser modules, and specialized materials are included in these restrictions, which extend beyond complete systems. Therefore, the overall development can be obstructed by the absence of supply chain connections, even when progress is made domestically.
At the same time, China had previously responded by purchasing equipment in an aggressive manner, thereby becoming the world’s largest purchaser of semiconductor manufacturing tools. However, this trajectory is currently in a state of change.
The emergence of overcapacity in specific segments and the tightening of restrictions are anticipated to result in a modest decline in spending on chipmaking equipment. This represents a shift from a process of accelerated expansion that relies on imports to a more domestically driven approach.
The Mature Node Strategy and Overcapacity
Although China meets obstacles in advanced nodes, it has increased its investment in mature semiconductor technologies, including 28nm, 45nm, 90nm, and beyond.
Automotive electronics, industrial systems, and consumer devices continue to depend on these processors. China’s production capacity in this sector has expanded swiftly, enabling it to compete effectively on a global scale.
Nevertheless, this success is not without its risks. Excess inventory may result from declining consumer electronics demand, which could exacerbate profitability and pricing pressures. Certain manufacturers have already issued warnings regarding the potential for a chip oversupply.
The focus on mature nodes provides China with a secure foundation, despite these challenges. It facilitates ongoing development while developing expertise that can eventually accommodate more sophisticated technologies.
The Rise of Domestic Equipment and Localization Efforts
As part of a more comprehensive import substitution strategy, China is placing a greater emphasis on the substitution of foreign equipment with domestic alternatives.
Etching, deposition, and materials processing are among the sectors in which local companies are making major progress. These companies are consistently expanding their technological capabilities and acquiring market share.
Chinese manufacturers are also developing sophisticated systems in the field of lithography. Prototypes and research initiatives are currently in progress, with the ultimate objective of attaining EUV capability. Nevertheless, there are still major technical obstacles, particularly in the development of light sources and optics.
The broader strategy involves investments in related sectors, including mask production, photoresists, and chip design software. China’s objective is to diminish its dependence on external suppliers by fortifying the entire ecosystem.
Challenges in Coordination and Fragmentation
Fragmentation within China’s semiconductor industry is one of the less discussed but critical issues.
Duplication of effort frequently results from the lack of sufficient coordination among various companies that are working on similar technologies. At the same time the overall development can be stalled by gaps in areas such as software integration or the supply of materials.
The necessity of a unified national strategy to more effectively align resources and accelerate innovation has been increasingly emphasized by industry leaders. Even solid individual developments may encounter difficulty in transforming into a completely integrated ecosystem in the absence of such coordination.
Prospects: Is it possible for China to surmount the lithography barrier?
China’s long-term trajectory remains strong, despite its contemporary constraints.
The nation continues in its substantial investments in infrastructure, talent acquisition, and research and development. The domestic semiconductor ecosystem is being progressively fortified by a combination of private sector innovation and government support.
Over the next decade, ambitious objectives include the expansion of advanced semiconductor manufacturing capabilities and the increase in the proportion of domestically produced components.
In spite of this, it is expected that EUV lithography will advance gradually. The complexity of the technology and the need for a fully integrated supply chain will necessitate time for breakthroughs.
Conclusion: An Extended Game of Technological Catch-Up
The semiconductor journey of China is a tale of both persistent constraints and accelerated progress.
On the one hand, the nation has established a strong position in mature semiconductor manufacturing, expanded its domestic equipment industry, and exhibited resilience in the face of external pressure. On the other hand, the extraordinary technical complexity and dependence on a global ecosystem of advanced lithography continue to serve as a formidable obstacle.
The forthcoming years will be of extreme significance. If China is able to successfully integrate its fragmented industry, overcome key technological challenges, and advance its lithography capabilities, it has the potential to substantially alter the global semiconductor landscape.
Until then, the competition persists—not only for transistors that are tiny, but also for technological independence.