Patent ID: 8513737

Claim:
An electrostatic discharge (ESD) protection element using an NPN bipolar transistor, comprising: a trigger element connected at one end with a pad, wherein said NPN bipolar transistor comprises: a first base diffusion layer; a collector diffusion layer connected with said pad; a trigger tap formed on said first base diffusion layer and connected with the other end of said trigger element through a first wiring; and an emitter diffusion layer and a second base diffusion layer each separately connected at a common junction provided at a second wiring directly connecting each of the emitter diffusion layer and the second base diffusion layer to the power supply, wherein the emitter diffusion layer and the second base diffusion layer are formed on said first base diffusion layer, and the second wiring at which the emitter diffusion layer and the second base diffusion layer are connected is different from said first wiring.