Patent ID: 8507946
Filing Date: 2013-08-13
Classification: H01L

Abstract:
1. An electrostatic discharge (ESD) protection device, comprising: a substrate comprising a first conductive type; a first doped region formed in the substrate and comprising a second conductive type, wherein the first and the second conductive types are opposite conductive types; a second doped region formed in the substrate and comprising the second conductive type; a third doped region formed in the substrate, comprising the first conductive type and located between and separated from the first and the second doped regions; a gate formed on an area of the substrate between the first and the second doped regions and comprising a first through hole and a second through hole, wherein the first and the second through holes are both formed within a same contiguous layer for the gate; and a plurality of separated first contacts passing through the first through hole to directly contact with the third doped region, wherein the same contiguous layer comprises a first closed loop and a second closed loop defining the first and second through holes respectively.