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China's rare earth export restrictions threaten global chipmaking supply chains | Scandium and Dysprosium are just the latest materials added to the list.
Scandium and Dysprosium are just the latest materials added to the list.
By introducing (doping) Scandium to Aluminum Nitride at levels of around 10% to 40%, ScAlN achieves higher piezoelectric response and electromechanical coupling (compared to AlN alone), which is critical for improving signal strength, bandwidth, and power efficiency in high-frequency telecom applications. The key reason why China is the dominant supplier of these materials and products on their base is because Chinese companies have managed to build an efficient ecosystem to mine, extract, and refine rare earth elements. (Image credit: Samsung)On one hand, this means that China's approach to export curbs indicates a deliberate, phased control strategy, targeting the entire vertical stack of semiconductor and high-tech production, including niche but irreplaceable elements.
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