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DENSO And Kyoto University Startup FLOSFIA Will Develop Next-Gen Power Semiconductor Device For Electrified Vehicles

DENSO also joins FLOSFIA series C funding round, investing in critical technology for the future of electrified vehicles

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DENSO Corp., one of the world’s largest automotive suppliers, and FLOSFIA Inc., a tech startup spun from Kyoto University, are partnering to develop a next-generation power semiconductor device that is expected to reduce the energy loss, cost, size and weight of inverters used in electrified vehicles (EVs). Through the joint development project, the two companies aim to improve the efficiency of EV power control units, which the two organizations believe will be key to driving widespread EV use.

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In addition to the joint development partnership, DENSO has acquired new shares issued by FLOSFIA in its Series C funding round. Financial terms of the investment were not disclosed. The two businesses will further research and develop technology in high-voltage products for hybrid and electric vehicles, including semiconductors.

Since 2007, DENSO has provided power control units (PCUs) for hybrid and electric vehicles. PCUs use an inverter to control the power supplied from the battery to the motor generator. To use electric energy more efficiently, energy losses during the DC to AC conversion by the inverter must be reduced, and so DENSO is conducting R&D on low-loss power semiconductors.

Professor Shizuo Fujita at Kyoto University pioneered the application of corundum structured gallium oxide (α-Ga2O3) for use in semiconductors. These semiconductors have a wide bandgap of 5.3 eV and high electric breakdown field strength, meaning they can better withstand high-voltage applications. α-Ga2O3 will replace today’s current silicon (Si) and silicon carbide (SiC) power semiconductors and help further develop the technologies that make tomorrow’s electrified vehicles a reality.

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