- New growth method works 1,000 times faster than conventional techniques
- Liquid gold and tungsten form the bilayer substrate for this process.
- Single-layer silicon nitride and tungsten films grew to a size of 1.4 by 0.7 inches
Chinese researchers have developed a wafer-scale 2D semiconductor growth method that works about 1,000 times faster than conventional techniques.
The Institute of Metal Research team revamped the chemical vapor deposition process by introducing a liquid bilayer of gold and tungsten as a substrate.
This method enabled wafer-scale growth of monolayer silicon tungsten nitride films with tunable doping properties.
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Why 2D materials matter for the future of chips
The resulting films reached dimensions of approximately 1.4 x 0.7 inches, marking a step toward scalable manufacturing of high-performance 2D semiconductors.
For decades, Moore’s Law predicted a doubling of computing power approximately every two years. But as transistor dimensions approach atomic scales, quantum effects and heat dissipation make miniaturization increasingly difficult.
2D semiconductors have emerged as a leading candidate for post-Moore chip materials, as increasing workloads from AI tools and large language models push current chip architectures to their limits.
Modern transistor architectures depend on the complementary pairing of N-type and P-type materials.
The shortage of high-performance P-type options has become a major constraint for next-generation chip design, because even though many 2D N-type semiconductors are well established, obtaining stable P-type counterparts remains a challenge.
“The lack of high-performance P-type materials has become a critical bottleneck for the development of sub-5 nanometer node 2D semiconductors,” said Zhu Mengjian of the National University of Defense Technology.
Single-layer silicon tungsten nitride films combine several key advantages for advanced transistor design.
These include high hole mobility, high on-state current density, mechanical strength, efficient heat dissipation, and chemical stability.
The process expands single-crystal domains to sub-millimeter sizes and increases production speed from approximately 0.00004 inches per five hours to approximately 0.0008 inches per minute.
This represents an increase of approximately 1,000 times compared to conventional approaches.
The research represents progress in 2D semiconductor manufacturing, but the gap between growing centimeter-scale films in the lab and mass producing defect-free wafers remains enormous.
The gold-based substrate, while effective for research, would be prohibitively expensive for high-volume production.
China’s ambition to overcome existing semiconductor limitations is understandable, and this study represents a major breakthrough.
Unfortunately, the industry has seen many promising 2D materials fail to move from academic papers to manufacturing plants.
Whether this material follows the same path will depend on overcoming the scalability and cost issues that doomed previous options.
Via Interesting engineering
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