Patent ID: 7858469

Claim:
A method of forming a trigger device for an electrostatic discharge (ESD) protection circuit comprising: forming a gate over a semiconductor substrate, the gate having a width and first and second sides; doping the substrate on both sides of the gate with dopants of a first conductivity type to form first and second source/drain extensions running the width of the gate on its first and second sides; heavily doping the substrate on the first side of the gate with dopants of a first conductivity type to form a first region running the width of the gate from which the first source/drain extension extends; heavily doping the substrate on the second side of the gate with dopants of a second conductivity type to form a second region running the width of the gate from which the second source/drain extension extends angle implanting the substrate on both sides of the gate with dopants of a second conductivity type to form a first pocket region under the first source/drain extension and extending under the gate and a second pocket region under the second source/drain extension and extending under the gate.