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A new online monitoring method to detect thermal resistance is proposed, utilizing high-speed sampling of the gate plateau voltage for power cycling degradation detection. For high-speed and highly ac...curate sampling of the gate plateau voltage, a new sampling technique called turbo sampling was developed. This method consists of 15 repetitive gate voltage measurements with a sampling timing shift of 12.5 ns. A method called the LHL method, which utilizes the temperature dependence of the plateau voltage, was also developed to observe the rise in junction temperature by measuring the plateau voltage before and after heating. Through power cycling tests, samples with an increase in thermal resistance of 15% to 29% were fabricated. By combining turbo sampling with the LHL method, the junction temperature rise was measured. As a result, the change rate of the plateau voltage increased by 11% to 25% before and after the power cycling tests, corresponding to the observed increase in thermal resistance.続きを見る
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Mendeley出力
