Patent ID: 8143673

Claim:
A circuit with electrostatic discharge protection, comprising: an output driver transistor with an extended drain contact region; and a distinct device configured to provide electrostatic discharge protection for the output driver transistor, the distinct device comprising: an electrostatic discharge protection transistor with an extended drain region, and a gate electrode spaced apart from the extended drain region by a field oxide isolation structure, wherein a portion of the length of the gate electrode overlaps at least a portion of the field oxide isolation structure, and wherein the length of the portion of the gate electrode is selected to determine the trigger voltage; a silicon controlled rectifier comprising: a first terminal spaced apart from the extended drain region of the electrostatic discharge protection transistor; and a second terminal configured to serve as a source contact region of the electrostatic discharge protection transistor; an ohmic contact region spaced apart from the first terminal of the silicon controlled rectifier; and a collection region arranged adjacent to the second terminal of the silicon controlled rectifier.