Patent ID: 6777721
Filing Date: 2004-08-17
Classification: H01L

Abstract:
An ESD protection structure for protecting an integrated circuit, comprising:a semiconductor controlled rectifier (SCR) structure having a first diffusion region and a second diffusion region of opposite conductivity types, both of said first diffusion region and second diffusion region being electrically connected to a pad of said ESD protection structure; and a third diffusion region adjacent said second diffusion region and formed using a lightly doped drain (LDD) implant process for forming lightly doped drain regions in said integrated circuit, and wherein said second diffusion region and said third diffusion region form a triggering diode that breaks down in response to an ESD pulse on said pad of said ESD protection structure, and wherein said second diffusion region is small compared to said first diffusion region to reduce an SCR capacitance associated with said ESD protection structure.