A Snapback-Free and Fast-Switching Shorted-Anode LIGBT With Multiple Current P-Plugs

A novel snapback-free and fast-switching Shorted-Anode Lateral Insulated Gate Transistor (SA LIGBT) with Multiple Current P-Plugs (MCP) in anode, named MCP LIGBT, is proposed and investigated. The device features Multiple separated Current P-Plugs which are inserted in the N-buffer. At the forward conduction mode, the MCP act as the potential barrier to block the electrons flowing directly to the N+ anode, and the N-channels sandwiched between the MCP are fully depleted, which both increase the anode distributed resistance (RSA). In the turn off process, the N-channels provide three high-speed paths for minorities extraction, which reduces the turn off time. Consequently, the proposed device not only eliminates the snapback effect, but also achieves superior tradeoff between Eoff and Von. At the same Von of 1.6 V, it reduces the Eoff by 45%, 22%, and 14% compared with the VPN LIGBT, SSA LIGBT and NCA LIGBT, respectively. Meanwhile, it exhibits the lowest Von of 1.21 V at Eoff of 2 mJ/cm2.