IGBT Chip

An Insulated Gate Bipolar Transistor (IGBT) chip is a three-terminal power semiconductor device that integrates the high-input impedance and fast switching characteristics of a MOSFET with the low on-state conduction losses of a bipolar junction transistor. It functions as an electronic switch in power electronics systems, capable of handling high voltages (typically 600V-6500V) and currents (up to several hundred amperes) with efficient thermal management through its semiconductor structure.

The IGBT chip operates by applying a positive voltage to the gate terminal relative to the emitter, which creates an inversion layer in the p-body region, allowing electrons to flow from the n+ emitter through the n- drift region to the collector. This electron flow injects holes from the p+ collector into the n- drift region, creating conductivity modulation that reduces on-state voltage drop. When the gate voltage is removed or made negative, the inversion layer disappears, and the device turns off by sweeping out excess carriers.