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ST and Leti to partner on GaN-on-Silicon power

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Cooperation to develop and industrialise advanced power GaN-on-Si diode and transistor architectures

Semiconductor giant STMicroelectronics and Leti, a research institute of CEA Tech (France), have announced their cooperation to industrialise GaN-on-Silicon technologies for power switching devices.

This technology will enable ST to address high-efficiency, high-power applications, including automotive on-board chargers for hybrid and electric vehicles, wireless charging, and servers.

The collaboration focuses on developing and qualifying advanced power GaN-on-Silicon diode and transistor architectures on 200mm wafers, a market that the research firm IHS Markit estimates to grow at a CAGR of more than 20 percent from 2019 to 2024.

Together, in the framework of IRT Nanoelec, ST and Leti are developing the process technology on Leti's 200mm R&D line and expect to have validated engineering samples in 2019. In parallel, ST will set up a fully qualified manufacturing line, including GaN/Si hetero-epitaxy, for initial production running in ST's front-end wafer fab in Tours, France, by 2020.

In addition, given the attractiveness of GaN-on-Si technology for power applications, Leti and ST are assessing advanced techniques to improve device packaging for the assembly of high power-density power modules.

"Recognising the incredible value of wide-bandgap semiconductors, ST's contributions in Power GaN-on-Si manufacturing and packaging technologies with CEA-Leti move to arm us with the industry's most complete portfolio of GaN and SiC products and capabilities, on top of our proven competence to manufacture high-quality, reliable products in volume," said Marco Monti, president Automotive and Discrete Group, STMicroelectronics.

"Leveraging Leti's 200mm generic platform, Leti's team is fully committed to supporting ST's strategic GaN-on-Si power-electronics roadmap and is ready to transfer the technology onto ST's dedicated GaN-on-Si manufacturing line in Tours. This co-development, involving teams from both sides, leverages the IRT Nanoelec framework program to broaden the required expertise and innovate from the start at device and system levels," said Leti CEO Emmanuel Sabonnadiere.

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