Abstract
15 kV-class 4H-SiC PiN diodes with various junction termination extension (JTE) structures have been experimentally investigated. JTE-dose dependence of the breakdown voltage for conventional single and two-zone JTE showed a narrow window of optimum JTE-dose to obtain high breakdown voltage. To widen this window, space-modulated JTE (SM-JTE) was introduced. 4H-SiC PiN diodes with SM-JTE showed a highest breakdown voltage of 15 kV, and a widening of the optimum JTE-dose window to obtain ultrahigh-voltage was realized at the same time.
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