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We developed a new technology for the Fuji 4th generation power module for hybrid vehicle application. It achieved a 30-% volume reduction, and a 33-% weight reduction compared to the 3r d generation. Requirement trends for the power module for hybrid vehicles are high energy-efficient, downsizing, lightweight and higher reliability. To achieve these requirements, IGBT module needs low thermal resistance and high operating temperature. We developed new technologies, 1) New cooling structure with high cooling performance. 2) The Tjmax.=175°C continuous operation with automotive required quality.

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