Strategic Materials in the AI Era: Market Status and Technological Prospects of Tungsten Hexafluoride

The “invisible hero” of computing power

As the world focuses on the GPU computing power competition, a low-key electronic gas is quietly supporting the entire AI chip industry – tungsten hexafluoride (WF₆).

As the core precursor in the semiconductor chemical vapor deposition (CVD) process, tungsten hexafluoride is used to deposit a tungsten film on the wafer, creating conductive pathways within the chip. In advanced manufacturing processes below 7nm, high-bandwidth memory (HBM), and 3D NAND flash memory with 300 layers or more, there is no mature commercial alternative for tungsten hexafluoride.

In this sense, the essence of competition in the AI industry is a competition in computing power, and the fundamental foundation of the computing power industry is firmly rooted in high-end semiconductor materials.

1. Market Status: Supply and demand are tight, and the market landscape is undergoing a transformation.

Demand side: AI-driven structural growth

According to data from industry research institutions, the global demand for tungsten hexafluoride has increased from approximately 4,500 tons in 2020 to nearly 9,000 tons in 2025, achieving a doubling over the five-year period. The main driving forces are:

• Expansion of AI chip production: Each advanced manufacturing process GPU/ASIC (specialized integrated circuit) requires tungsten hexafluoride for multi-layer tungsten deposition.
• HBM demand surges: The number of stacking layers keeps increasing, and the material consumption per chip also rises simultaneously.
• 3D NAND technology is evolving towards more than 300 layers: The more layers there are, the more frequently the tungsten deposition process is carried out.

The institution predicts that the global market size of tungsten hexafluoride will be approximately 740 million US dollars in 2026, and will rise to 3.45 billion US dollars by 2035.

Supply-side: High barriers restrict the release of production capacity

There are two core barriers in the production of tungsten hexafluoride:

• Technical barriers: Chip-level products require a purity of 6N (99.9999%) or higher, and the control standards for trace impurities are extremely strict.
• Certification barriers: New production capacity must undergo a complete process validation of up to 1 to 2 years at the downstream wafer fabrication plants.

At present, the main production capacity is concentrated in China, South Korea and Japan. The recent changes in the upstream tungsten raw material market are having a transmission effect on the global supply pattern.

2. Technological Outlook: The competition for purity has not yet come to an end

Purity upgrade: From 6N to 7N

As the manufacturing process advances towards 3nm and 2nm, the requirements for metal impurities and particles in tungsten hexafluoride have shifted from ppm (one part per million) to ppb (one part per billion), with 7N-grade products further achieving ppt-level (parts per trillion) impurity control. Products at the 7N level have moved from R&D to mass production, with Chinese manufacturers leading the global commercialization progress.

The evolution of the industrial chain

In the past, our country only exported basic tungsten raw materials, while high-end, high-purity electronic-grade products were long dependent on imports. In recent years, China has achieved key technological breakthroughs, and 6N grade products have completed large-scale production, gradually entering the supply chain of international mainstream wafer factories. This evolution reflects the improvement of China’s comprehensive competitiveness in the semiconductor materials field.

3. Industry Challenges and Realistic Constraints

While focusing on opportunities, one should also rationally assess the current stage’s practical constraints:

• Capacity release takes time: The construction of new capacity usually takes 2 to 3 years before it can be put into production. The short-term market supply elasticity is insufficient.
• The progress of customer certification varies: Most production lines are still in the trial production and sample certification stage, and have not yet achieved large-scale performance.
• The uncertainty of technological iteration: New processes such as selective tungsten deposition and atomic layer deposition are gradually maturing, which may change the overall usage amount and structure of materials.
• The unpredictability of upstream raw material supply: Tungsten is a strategically important mineral resource of the country. Adjustments in related import and export policies may disrupt the stability of the global supply chain.

These challenges do not negate the prospects of the industry; rather, they serve as a reminder that this is a long and arduous journey that requires patience.

4. International Perspective: Rebalancing of Global Supply Chains

It is worth noting that the change in the supply pattern of upstream tungsten raw materials has had a substantial impact on the global tungsten hexafluoride market. According to public reports, some major Japanese manufacturers have issued supply warnings to their customers, indicating that there is uncertainty in the supply of raw materials. Against this backdrop, global semiconductor factories are actively promoting diversified supply chain layouts and reducing the risk of single supply, which also brings new development opportunities for domestic enterprises with a complete industrial chain advantage.

Conclusion: Materials are the foundation of computing power.

The story of tungsten hexafluoride reveals a long-neglected truth: GPUs are the “front-stage stars” of the computing power industry, while hundreds of semiconductor materials are the indispensable “backstage pillars”.

Special gases, high-purity target materials, photoresists, precursors – in each of these specialized fields, there are extremely high technical barriers. Each of them is under the pressure of demand brought about by the expansion of AI chip production, and the expansion of their production capacity is measured in years.

As domestic substitution progresses from “achieving self-production” to “having global competitiveness”, these once “industrial flavor enhancers” are now becoming a solid underpinning in the competition of the technology industry.

The vast expanse of AI begins with every gram of ultra-high-purity semiconductor material.