Static and Dynamic Characterization of a GaN-on- GaN 600 V, 2 A Vertical Transistor
Fig. 1 shows the vertical GaN transistor developed by HRL Laboratories, which is overcoming these barriers. This paper describes the vertical GaN fabrication process and the circuit developed to test this device. The vertical GaN transistor is demonstrated to have a threshold voltage of 3.3 V, a static breakdown voltage of 600 V, and an on-resistance of 880 m&Omega. For the dynamic characterization, the device is shown to have switching speeds up to 97 V/ns, and turn-on and turn-off switching losses of 8.12 µJ and 3.04 µJ, respectively, demonstrating the great potential of this device. It is the first vertical GaN transistor reported to have a dynamic breakdown voltage of up to 450 V. The waveform for this voltage level is shown in Fig. 2. The results illustrate the immense potential of developing this technology further.