A fast switching npn controlled lateral insulated gate bipolar transis
tor (NC-LIGBT) suitable for high voltage integrated circuits is propos
ed. An open base npn transistor incorporated within the device strongl
y influences its on-state and switching behaviour. Further, by varying
the ratio between n(+)/p(+) regions or the concentration of the p wel
l at the anode end, a suitable trade-off between forward drop and turn
-off time can be easily realised by this single gated device.