Patent ID: 7190030

Claim:
An electrostatic discharge (ESD) protection structure, comprising: an P-type substrate having a buried layer therein, the P-type substrate further comprising: an N-type epitaxial layer above the buried layer; at least a first isolation structure and a second isolation structure disposed at both sides of the N-type epitaxial layer; a first P-type body (P body) region and a second P-type body region respectively at one side of the first and second isolation structures; an N-type base region located between the first and the second P-type body regions, wherein the N-type base region, the first P-type body region and the second P-type body region are separated from each other; an N-type drain region disposed in and surrounded by the N-type base region; and a first P+ doped region and a first N+ doped region disposed in the first P-type body region, wherein the first P+ doped region is closer to the first isolation structure than the first N+ doped region; a second P+ doped region and a second N+ doped region disposed in the second P-type body region, wherein the second P+ doped region is closer to the second isolation structure than the second N+ doped region; and at least a first gate and a second gate disposed on the P-type substrate, wherein the first gate is disposed between the N-type drain region and the first P-type body region, while the second gate is disposed between the N-type drain region and the second P-type body region.