Electrostatic discharge protection device

Abstract

An electrostatic discharge protection device is coupled between a first power line and a second power line and comprises a P-type well, a first N-type doped region, a first P-type doped region, a second P-type doped region and a second N-type doped region. The first N-type doped region is formed in the P-type well. The first P-type doped region is formed in the first N-type doped region. The second P-type doped region comprises a first portion and a second portion. The first portion of the second P-type doped region is formed in the first N-type doped region. The second portion of the second P-type doped region is formed outside of the first N-type doped region. The second N-type doped region is formed in the first portion of the second P-type doped region. 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).

Dependencies are inferred from the claim text.