Patent ID: 8049307
Filing Date: 2011-11-01
Classification: H01L

Abstract:
1. An insulated gate bipolar transistor electrostatic discharge (IGBT-ESD) protection device, comprising: a P-type semiconductor substrate; a patterned insulation region disposed on the P-type semiconductor substrate defining a first active region and a second active region; a high-voltage N-well formed in the first active region of the P-type semiconductor substrate; a P-body doped region formed in the second active region of the P-type semiconductor substrate, wherein the high-voltage N-well and the P-body doped region are separated with a predetermined distance exposing the P-type semiconductor substrate; a P a P a gate structure disposed on the P-type semiconductor substrate with one end adjacent to the N a diffusion region extending from the high-voltage N-well to the P-body doped region, wherein the diffusion region and the P-body doped region are separated from each other only by a portion of the P-type semiconductor substrate free from any additionally doped region, and wherein a bottom of the diffusion region is aligned with that of the high-voltage N-well.