Patent ID: 6690067
Filing Date: 2004-02-10
Classification: H01L

Abstract:
A substrate-triggered electrostatic discharge (ESD) protection component, suitable for application on a substrate, comprising:a first doped region of a first conductivity type and formed on the substrate; a bipolar junction transistor (BJT) comprising: an emitter and a collector respectively formed by a second doped region and a third doped region on the first doped region, both of a second conductivity type; and a base, formed by part of the first doped region between the second and the third doped regions; a substrate-triggering region, formed by a fourth doped region of the first conductivity type in the first doped region, to provide triggering current; and a dummy gate structure having a poly-silicon gate, formed adjacent to the third doped region, and surrounding the substrate-triggering region; wherein the emitter is coupled to a power line, the collector is coupled to a pad, and the substrate-triggering region is coupled to an ESD detection circuit; during normal circuit operations, the base couples with the power line through the ESD detection circuit; and during an ESD event, a triggering current is provided to the substrate-triggering region by the ESO detection circuit to trigger the BJT and release ESD current.