Abstract
A Full Hole-barrier Trench gate Insulated Gate Bipolar Transistor (FH-TIGBT) device structure is proposed for the first time. Compared with Carrier Stored Trench IGBT (CSTBT), which adds a carrier stored n layer between p base and n base in Trench IGBT (TIGBT), the new structure appends an n region located in the bottom of the trench gate. The result of Process and device simulations shows that the proposed device has lowered saturation voltage and larger capability of carrying current compared to either conventional trench IGBT or CSTBT. And the characteristics of turn-off time and breakdown voltage have negligibly changed. Further more, it has strongly positive temperature coefficient of on-state voltage, which means paralleling is very simple for the new device.
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