Patent ID: 7329925

Claim:
A device for electrostatic discharge protection, said device for electrostatic discharge protection comprising: a semiconductor transistor formed in a P type semiconductor substrate, said semiconductor transistor having an N+ diffusion region emitter, a P+ diffusion region base and an N+ diffusion region collector electrically connecting to a first power line, a second power line and a bond pad of an integrated circuit respectively, wherein said semiconductor transistor comprises a lateral bipolar; and a diode having said N+ diffusion region emitter as an N electrode and a P electrode including a P+ diffusion region, said N electrode and P electrode electrically connecting to said first power line and said bond pad respectively; wherein said P+ diffusion region base and said N+ diffusion region collector are formed in two adjacent P wells isolated by a field oxide region, and thus construct a parasitic diode in said P type semiconductor substrate.