Patent ID: 8723257
Filing Date: 2014-05-13
Classification: H01L

Abstract:
1. An electrostatic discharge (ESD) protection device, comprising: an N-well region, configured in a substrate; a first N-type doped region, configured in the N-well region; a first P-type doped region, configured in the N-well region and surrounding the first N-type doped region and directly connecting to the first N-type doped region; a second N-type doped region, configured in the N-well region and surrounding the first N-type doped region and the first P-type doped region, wherein the second N-type doped region and the first P-type doped region are separated from each other; and a second P-type doped region, configured in the N-well region and under the first N-type doped region and the first P-type doped region, wherein the second P-type doped region is coupled with the first N-type doped region and with the first P-type doped region, respectively, and the second P-type doped region does not exceed an outer boundary of the first P-type doped region.