Patent ID: 10211200

Abstract:
The present disclosure relates to a Silicon Controlled Rectifier (SCR) in non-planar technology to provide a robust ESD protection in System on Chip employing non-planar technologies. The disclosed SCR incorporates wire or fin shaped nanostructures extending from p-type tap to cathode, from the cathode to anode, and from the anode to n-type tap to provide parallel trigger paths to prevent problem of current crowding at the base emitter junction that limits efficient turn-on in conventional SCRs. The proposed structure helps in offering lower trigger and holding voltage, and therefore very high failure currents. The disclosed SCR has sub-3V trigger and holding voltage to provide an efficient and robust ESD protection in SOCs. The proposed device also offers three times better ESD robustness per unit area. Further the proposed SCR has no added capacitive loading and is compatible with standard process flow and design rules.