4H-SiC n-Channel DMOS IGBTs on (0001) and (000-1) Oriented Lightly Doped Free-Standing Substrates
2016
We experimentally demonstrate 4H-SiC n-channel, DMOS Insulated Gate Bipolar Transistors (IGBTs) on 180 µm thick lightly doped free-standing n- substrates with an ion-implanted collector region, and metal-oxide-semiconductor (MOS) gate on (0001) and (000-1) surfaces. The IGBTs show an on-state current of 20A/cm2 at a power dissipation of 300W/cm2. Threshold voltage of 7.5V and 10.5V was obtained on Si-face and C-face respectively. Both IGBTs show a small positive temperature coefficient of the forward voltage drop, which is useful for easy parallelization of devices.
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