IGBT/MOSFET Chips

IGBT (Insulated Gate Bipolar Transistor) and MOSFET (Metal-Oxide-Semiconductor Field-Effect Transistor) chips are power semiconductor devices that serve as the core switching elements in inverter bridge modules. IGBT chips combine the high-input impedance and fast switching of MOSFETs with the low saturation voltage of bipolar transistors, making them ideal for medium to high-power applications (typically 600V-6.5kV). MOSFET chips offer superior switching speeds and efficiency at lower voltage ranges (typically up to 1000V). These chips are fabricated using silicon or silicon carbide (SiC) substrates with multiple epitaxial layers, gate structures, and metallization patterns to handle high current densities and voltage blocking capabilities.

IGBT chips operate by using a voltage applied to the gate terminal to create an inversion layer in the semiconductor, allowing current flow between collector and emitter. They exhibit conductivity modulation where minority carriers are injected into the drift region, reducing on-state voltage. MOSFET chips operate by creating a conductive channel between source and drain through gate voltage application, with current flow controlled by the electric field in the channel. Both devices switch between conducting and blocking states through gate control signals, enabling precise power modulation in inverter circuits.