Patent ID: 9633992
Date: 2017-04-25
CPC Classifications: H01L

Claim:
1. An electrostatic discharge protection device, comprising: a first well having a first conductive type; a first doping region having a second conductive type and formed in the first well; a second doping region having the second conductive type and formed in the first well; a third doping region having the first conductive type and formed in the second doping region; a fourth doping region having the second conductive type and formed in the second doping region; a first trigger gate formed on the first well and partially covering the second doping region; a second well having the first conductive type; a fifth doping region having the second conductive type and formed in the second well; a sixth doping region having the second conductive type and formed in the second well; a seventh doping region having the first conductive type and formed in the sixth doping region; an eighth doping region having the second conductive type and formed in the sixth doping region; and a second trigger gate formed on the second well and partially covering the sixth doping region, wherein the first conductive type is different from the second conductive type.