China Scales Up Photonic Chip Production in Wuxi as US Technology Curbs Tighten

Wuxi Builds Capacity for Millions of Photonic Chips

A production line in Wuxi, in China's Jiangsu province, is bringing a technology built around light closer to wider commercial use. The Chip Hub for Integrated Photonics Xplore (CHIPX), an institute affiliated with Shanghai Jiao Tong University, has launched large scale production of photonic chips as China works to reduce its dependence on foreign semiconductor technology.

The facility produces photonic chip wafers made from thin film lithium niobate, each measuring 6 inches across. Its annual capacity is 12,000 wafers, with each wafer yielding about 350 chips. Together, those figures amount to a potential 4.2 million chips a year at the stated capacity.

The production scale is a first for China. It gives the country a domestic manufacturing platform for components intended for optical communications, quantum technologies and the movement of large amounts of data, including within artificial intelligence (AI) data centers.

CHIPX began operating in September 2023 and has been recognized by China's Ministry of Industry and Information Technology as a key national pilot platform. Such a platform connects laboratory research with the testing and manufacturing work needed to make products in larger quantities.

The expansion comes as the United States tightens restrictions on China's access to advanced semiconductors, manufacturing equipment and design software. China's response stretches beyond this Wuxi facility: it includes laboratories backed by the state, new university programs and efforts to automate chip design.

For China, the immediate challenge is to turn research achievements into components that companies can use at scale while reducing dependence on imported materials and equipment. Photonics offers another route for improving communications and computing, even as parts of its supply chain remain heavily reliant on foreign technology.

What Changes When Chips Use Light?

Photonic chips, also called photonic integrated circuits, use photons, the particles of light, to carry information. Conventional electronic chips use electrons. The central difference is the way information moves through the device.

Light offers a route to very high data transmission rates. Photonic chips can also handle large amounts of information at the same time, giving them the bandwidth needed for demanding communications networks. Bandwidth describes how much data a connection can carry at once.

Lower power consumption and less heat are other potential advantages. Those qualities matter in data centers and demanding computing systems, where moving and processing enormous quantities of information consumes energy and creates heat that must be managed.

The applications identified for photonic chips extend across quantum computing, data communications, autonomous vehicles, biomedical technology, defense and aerospace. Their ability to transmit and process information quickly also makes them relevant to 5G networks and the development of 6G.

Quantum computing is one of the strategic priorities behind China's interest. Photonic chips can support the development of quantum computers and quantum computing networks, technologies with potential uses ranging from cryptography to drug discovery. Optical communications and AI data centers offer other routes toward commercial adoption.

CHIPX Connects Research With Manufacturing

Jin Xianmin, director of CHIPX, describes the Wuxi production line as an integrated operation combining research and development, process validation and manufacturing that can expand in scale. Process validation means checking whether a manufacturing method works as intended before using it more widely.

Jin presented the achievement as a step toward stronger domestic capabilities in quantum technology:

a further enhancement in China's self-reliance and global competitiveness in quantum technologies.

CHIPX is also designed to share chip design and processing expertise with industry partners. That makes the platform more than a source of finished components: companies can use its knowledge and production capabilities to help move designs toward commercial use.

The intended markets include 5G and 6G communications, AI data centers and quantum computing networks. The initiative is also expected to support Wuxi's ambitions to become a center for AI development and help address constraints on computing power.

The connection between research, testing and manufacturing is central to that effort. A chip developed in a laboratory must still pass through production checks before it can become a component made repeatedly for customers. CHIPX brings those stages together within one platform.

US Restrictions Shape China's Technology Push

The United States has placed major Chinese technology companies, including Huawei and Semiconductor Manufacturing International Corporation (SMIC), on trade blacklists as part of restrictions introduced since 2018. Those measures limit access to foreign technologies that Chinese companies need for advanced chip development and production.

The restrictions expanded under both the Trump and Biden administrations. Successive rounds of export controls and tariffs have affected companies, research institutions and universities, widening the pressure beyond commercial chipmakers.

China has responded by accelerating investment in alternative technologies, including compound semiconductors, photonics and quantum computing. Its approach also includes closer cooperation across supply chains, higher research spending and the creation of pilot production lines and research centers around the country.

The main dates and developments described in that effort are:

• Since 2018: US trade restrictions have targeted major Chinese technology companies, with controls expanding under the Trump and Biden administrations.
• September 2023: CHIPX began operating in Wuxi.
• 2023: China's research and development spending exceeded 3.3 trillion yuan, while its photonic chip market was valued at 13.8 billion yuan.
• 2024: Consultancy AskCI projected that China's photonic chip market would reach about 15.2 billion yuan.
• By June 11, 2025: CHIPX had launched large scale production with annual capacity of 12,000 wafers, each yielding about 350 chips.

Wuhan and Ningbo Support the Production Effort

Chinese chipmakers and equipment manufacturers, many of them subject to US blacklists, have increasingly turned to laboratories backed by the state and pilot production lines affiliated with universities. Facilities in Wuhan, Wuxi and Ningbo provide test production and verification services.

These institutions often have more flexible access to overseas technology than commercial companies. That access helps make them useful places to test equipment, examine materials and check chip designs before manufacturers commit to larger production runs.

Hubei Yangtze Memory Labs in Wuhan, for example, allows engineers from Yangtze Memory Technologies (YMTC) to verify new chip designs before mass production. The work helps connect the design stage with the practical requirements of manufacturing.

JFS Laboratory, also in Wuhan, specializes in compound semiconductors and silicon photonics. It has attracted leading scientific talent from around the world as China seeks to build capabilities in technologies beyond conventional electronic chips.

Across these facilities, the tasks include benchmarking equipment, validating new materials and supporting the development of future technologies. Benchmarking means comparing equipment's performance against a reference, helping manufacturers judge whether it meets their needs.

Research Spending and Universities Build Capacity

China's semiconductor strategy also depends on funding and trained workers. According to the National Bureau of Statistics, the country's research and development spending exceeded 3.3 trillion yuan, or about US$458 billion, in 2023. That was nearly twice the level recorded in 2017.

The spending increase accompanies the creation of semiconductor schools at universities, including Shanghai Jiao Tong University and Nanjing University of Aeronautics and Astronautics. Their purpose is to broaden access to fundamental technologies and train more people within China.

The programs cover electronic design automation, equipment used to produce chips and advanced chip manufacturing. Together, those subjects address several stages of the semiconductor industry, from drawing up a circuit to operating the machinery that makes it.

China is also encouraging industry clusters, bringing companies, research institutions and skilled workers into closer contact. The combination of education, research investment and manufacturing platforms is intended to reduce reliance on foreign expertise as well as foreign products.

QiMeng Targets the Chip Design Process

The Chinese Academy of Sciences (CAS) has recently unveiled QiMeng, an AI driven system designed to automate the integrated circuit design process. It uses large language models as part of an effort to reduce the time and cost involved in developing chips.

QiMeng is described as capable of automating the full design process while matching the performance and efficiency of chips designed by human experts. Its role concerns how circuits are designed, complementing the manufacturing work being developed at facilities such as CHIPX.

The timing matters because the United States has pressed leading suppliers of electronic design automation (EDA) software to halt sales to China. EDA software provides tools used to create chip designs, making access to it an important part of semiconductor development.

Domestic alternatives such as QiMeng are intended to keep that development moving despite restrictions on foreign tools. China's effort therefore covers both the physical production of chips and the software used to design them.

A Growing Market Still Relies on Imports

Chinese consultancy AskCI projected that the country's photonic chip market would reach about 15.2 billion yuan, or US$2.1 billion, in 2024, compared with 13.8 billion yuan in 2023. The projected increase was 1.4 billion yuan, approximately 10 percent.

Domestic supply remains limited in some advanced photonic chip segments. The localization rate for parts of their supply chains is below 5 percent, reflecting substantial dependence on imported materials and equipment for certain critical components.

That makes the Wuxi production expansion one part of a larger industrial task. Greater chip manufacturing capacity must be supported by access to the materials, equipment and expertise needed to keep production running.

Research institutions also face political restrictions. Although universities and research institutes generally encounter fewer trade limits than commercial companies, the United States has placed several leading Chinese universities on its Entity List, requiring stricter reviews for exports and collaborations.

Europe is also scrutinizing research partnerships with China more closely because of concerns about research security and technology transfer. Those pressures affect the international relationships on which scientific and industrial development can depend.

Investment and Strategic Pressure Drive Competition

Stephen Ezell, vice president for global innovation policy at the Information Technology and Innovation Foundation, links China's growing capabilities to its research spending. He described the possibility of China overtaking US spending if investment trends and budget constraints pull the two countries in different directions:

In all sectors and in overall expenditure, China [has] neared the US in R&D spending. If China continues to invest heavily and if the US finds its budgetary environment constrained, it's certainly possible China could outstrip the US.

Mathieu Duchatel, director of international studies at Institut Montaigne, points to the role of external pressure in mobilizing Chinese innovation. He cautions against dismissing that capacity because of inefficiencies in the country's economic system:

People should not underestimate China's capacity for innovation just because of inefficiencies in its state-driven system. The intense strategic pressure on China from the US and its allies is also a significant mobilizing force.

China's progress comes with inefficiencies and overcapacity in parts of its state directed system. Chinese companies also continue to lag in certain advanced manufacturing processes, even as photonics, AI driven design and alternative semiconductor materials offer routes toward narrowing technology gaps.

The Wuxi expansion adds to competition in an industry where companies such as TSMC and Samsung have established strong positions. Photonic chips could support faster, more energy efficient movement and processing of data for AI systems, while also contributing to the development of quantum computers.

Global semiconductor production remains interconnected. China's effort to become more self sufficient continues alongside reliance on imported equipment and materials. No date is given for achieving broader independence in advanced photonic chip supply chains, leaving that work unfinished as export controls and geopolitical tensions continue to shape the industry.

Key Points

• CHIPX in Wuxi has launched large scale production of photonic chips using 6 inch wafers made from thin film lithium niobate.
• Annual capacity is 12,000 wafers, with about 350 chips per wafer, equivalent to a potential 4.2 million chips.
• The facility began operating in September 2023 and combines research, production testing and manufacturing.
• Intended applications include optical communications, 5G and 6G, AI data centers and quantum computing networks.
• China is expanding research spending, university training, pilot production facilities and domestic chip design tools in response to foreign technology restrictions.
• AskCI projected a photonic chip market of 15.2 billion yuan in 2024, up from 13.8 billion yuan in 2023.
• Parts of some advanced photonic chip supply chains have localization rates below 5 percent, leaving continued reliance on imports.