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Investigation of Silicone-Based Encapsulants for a High-Temperature Power Module
Keywords: encapsulants, high temperature power module, reliability
Emerging Silicon Carbide (SiC) semiconductors enable power electronic systems to operate at temperatures of at least 200C. Developing a high temperature capable encapsulant is one of the critical challenges for high temperature power semiconductor modules. Especially since they must withstand high temperature, environmental attack, and partial discharge due to internal high voltage. Most silicone-based encapsulant materials have a temperature limitation of 150C. Higher temperatures can cause these encapsulants to either chemically degrade or exert excessive mechanical stress on internal components. A limited number of encapsulant gels have been marketed for operation above 200C. These high temperature encapsulants are evaluated for electrical and thermal reliability under high temperatures.
Yunqi Zheng,
Athena Energy, LLC
Bowie, MD

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