Design of enhancement mode single-gate and doublegate multi-channel GaN HEMT with vertical polarity inversion heterostructure

We propose the design and simulation study of novel gallium nitride (GaN) devices, consisting of nitride stacks with different polarity, to provide multiple channels by flexible gate(s) control. Calibrated TCAD device simulations visualize device characteristics of 0.62-μm-gate-length multi-channel transistors. E-mode operations demonstrate a positive small threshold voltage V_th below 2 V at V_ds = 0.1 V for all multichannel devices, and a high on-state current I_on (V_gs = V_ds = 4 V) up to 4 A/mm achieved by 4 channels induced within the device.