![]() |
| Defu Technology |
Defu copper foil facility plans will add another major layer of Chinese capacity for high-end electronic circuit materials as artificial intelligence, communications and energy transition sectors lift demand for specialised copper products. Defu Technology will invest 3.1bn yuan to build the project in Jiujiang, Jiangxi province.
Defu copper foil facility development will be focused on high-end AI electronic circuit copper foil. The project will be built in two phases, each with 25,000 t/yr of production capacity.
Defu copper foil facility timing has not yet been disclosed. But the investment signals continued confidence in downstream copper demand linked to AI infrastructure, 5G and 6G communications, low-earth-orbit satellites and new energy applications.
The company already had 175,000 t/yr of copper foil capacity at the end of 2025. Its output rose by 50% to 139,600t last year, while sales increased by 52% to 140,900t.
AI Infrastructure Adds New Demand Layer for Copper Foil
Copper foil is becoming more strategically important as electronics, batteries and data infrastructure demand higher-performance materials. AI systems require dense electronic circuits, high-speed signal transmission and reliable thermal and electrical performance.
Defu’s new project targets that shift. High-end electronic circuit copper foil is used in printed circuit boards and advanced electronics, where quality, thickness control and surface performance can determine reliability.
AI-related demand is still emerging, but it is already becoming relevant to copper markets. Some market participants estimate global copper demand from AI-related applications could reach around 350,000t in 2026.
That demand does not come only from data-centre power cables. It also includes circuit materials, cooling systems, electrical equipment, grid connections, transformers and backup power infrastructure.
Defu is therefore positioning itself closer to higher-value copper demand. The company is not simply expanding commodity capacity; it is targeting sectors where copper foil quality and customer qualification matter.
New Energy and Electronics Support Capacity Expansion
Energy transition sectors remain a key driver for electrolytic copper foil demand. Copper foil is widely used in lithium-ion batteries, especially as current collector material for anodes.
China’s copper foil operating rates improved significantly in 2025. Average electrolytic copper foil operating rates rose to 77.1%, up by 18.8 percentage points from a year earlier.
That recovery reflects stronger downstream demand from battery, electronics and new energy markets. It also helps explain why producers such as Defu are still adding capacity despite competition across China’s materials sector.
The planned Jiujiang facility will lift Defu’s ability to serve multiple growth markets. These include AI hardware, communications equipment, satellites, batteries and other high-end electronics.
However, expansion also raises competitive pressure. As more Chinese copper foil capacity enters the market, producers will need to differentiate through product quality, customer qualification and exposure to higher-margin applications.
For copper demand, the project reinforces a broader structural point. Electrification is no longer limited to EVs and grids. AI, satellites, communications and advanced electronics are adding new copper-intensive demand channels.
The Metalnomist Commentary
Defu’s investment shows that copper demand is becoming more technology-driven and more specialised. The strongest copper foil producers will be those that can move beyond volume growth and qualify into AI, battery and high-end electronics supply chains.












We publish to analyze metals and the economy to ensure our progress and success in fierce competition.