Static induction thyristor

The static induction thyristor (SIT, SITh) is a thyristor with a buried gate structure in which the gate electrodes are placed in n-base region. Since they are normally on-state, gate electrodes must be negatively or anode biased to hold off-state.^[1] It has low noise, low distortion, high audio frequency power capability. The turn-on and turn-off times are very short, typically 0.25 microseconds.^[2][3][4]

History

The first static induction thyristor was invented by Japanese engineer Jun-ichi Nishizawa in 1975.^[5] It was capable of conducting large currents with a low forward bias and had a small turn-off time. It had a self controlled gate turn-off thyristor that was commercially available through Tokyo Electric Co. (now Toyo Engineering Corporation) in 1988. The initial device consisted of a p+nn+ diode and a buried p+ grid.^{[citation needed]}

In 1999, an analytical model of the SITh was developed for the PSPICE circuit simulator.^[6] In 2010, a newer version of SITh was developed by Zhang Caizhen, Wang Yongshun, Liu Chunjuan and Wang Zaixing, the new feature of which was its high forward blocking voltage.^[7]

See also

• Static induction transistor
• MOS composite static induction thyristor