Patent ID: 8008687

Claim:
An electrostatic discharge protection device, comprising: a substrate having a first conductive type; a first doped region having a second conductive type and formed in the substrate; a first gate electrode formed on the substrate; a second doped region having the second conductive type and formed in the substrate, wherein a transistor is constituted by the first doped region, the first gate electrode, and the second doped region; a second gate electrode formed on the substrate, wherein the first and the second gate electrodes are separated; a third doped region having the first conductive type and formed in the substrate, wherein a discharge element is constituted by the first doped region, the second gate electrode, and the third doped region; and a fourth doped region having the first conductive type and formed in the substrate for isolating the second and the third doped regions, wherein the fourth doped region further isolates the first and the second gate electrodes.