Patent ID: 8278736

Claim:
An electrostatic discharge protection device coupled between a first power line and a second power line, comprising: a P-type well; a first N-type doped region formed in the P-type well; a first P-type doped region formed in the first N-type doped region; a second P-type doped region, wherein a first portion of the second P-type doped region is formed in the first N-type doped region and a second portion of the second P-type doped region is formed outside of the first N-type doped region; and a second N-type doped region formed in the first portion of the second P-type doped region, wherein the first P-type doped region, the first N-type doped region, the second P-type doped region and the second N-type doped region constitute an insulated gate bipolar transistor (IGBT).