Patent ID: 7612410

Claim:
A trigger device for an electrostatic discharge (ESD) protection circuit, said device comprising: a substrate having a first conductivity type; a gate on the substrate and insulated therefrom, said gate having a width and first and second sides; a first heavily doped region in the substrate, said region extending for the width of the gate on its first side and having a first conductivity type; a second heavily doped region in the substrate, said region extending for the width of the gate on its second side and having a second conductivity type; a first source/drain extension in the substrate, said extension extending for the width of the gate and extending from the first heavily doped region toward the second heavily doped region and having a second conductivity type; a second source/drain extension in the substrate, said extension extending for the width of the gate and extending from the second heavily doped region toward the first heavily doped region and having a second conductivity type; a first pocket region located under the first source/drain extension and extending under the gate; and a second pocket region located under the second source/drain extension and extending under the gate, the first and second pocket regions having a first conductivity type.