Abstract
The phenomenon that the wide P-emitter region in the conventional reverse conducting insulated gate bipolar transistor (RC-IGBT) results in the non-uniform current distribution in the integrated freewheeling diode (FWD), and then causes a parasitic thyristor to latch-up during its reverse-recovery process, which induces a hot spot in the local region of the device is revealed for the first time. Furthermore, a novel RC-IGBT based on double trench IGBT is proposed. It not only solves the snapback problem but also has uniform current distribution and high ruggedness during the reverse-recovery process.
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