Introducing a 1200V vertical merged IGBT and Power MOSFET: The HUBFET

This paper introduces a merged vertical IGBT and Power MOSFET dubbed the HUBFET (Hybrid Unipolar Bipolar Field Effect Transistor). The HUBFET exhibits characteristics of each of the merged devices under differing conditions hence it is both Unipolar and Bipolar in operation. The prototype device is rated to 1200V and is operated in the same way as a conventional IGBT or Power MOSFET. It conducts up to 1 A.cm −2 in unipolar mode in the on-state (for VDS −2 in bipolar mode (for VDS > 1 V). The device also features a reverse conducting PiN diode, the same as that seen in a Power MOSFET. Presented here are simulated and measured on-state characteristics and measured inductive turn-off performance.