Papers by Keyword: Bipolar Junction Transistor

Abstract: This paper compares the static properties for Silicon & SiC BJTs when connected in parallel, under various operating temperatures at various base currents and collector currents. This includes analysis of forward I-V characteristics, on-state resistance, DC gain, forward transfer characteristics and reverse leakage current to provide insights on paralleling of SiC & SiC BJTs.

Abstract: In this paper, the static and dynamic characterization of a High Voltage (10kV) 4H-SiC Bipolar Junction Transistor (BJT) is presented. Using a high-voltage source in vacuum conditions, a breakdown voltage of 11 kV was measured. Results showed that both large and small BJTs exhibit similar on-state resistance per unit area and collector current density of 55 A.cm^-2. The current gain increases with a decrease in temperature, indicating reduced charge carrier recombination at lower thermal energies. Also, BJT have been characterized in switching mode at 1 kV. The study concludes that 4H-SiC BJT demonstrates promising electrical performance for high-efficiency applications in harsh environments.

Abstract: In this paper, a first demonstration of the optical triggering of a 10 kV 4H-SiC Bipolar Junction Transistor is reported. A laser emitting UV (349 nm) has been used for the generation electron-hole pairs within the device. A current density of about 20 A.cm^-2 has been obtained. This low value in comparison with 100 A.cm^-2 for “conventional” BJT is due to the narrow pulse width (5 ns). The current waveform shows the effect of the carrier lifetime in the base and collector regions. From these measurements, we have extracted the I_C (V_CE) characteristics for different laser optical power and the switch-on time which is about 1 µs.