Patent ID: 7067884
Filing Date: 2006-06-27
Classification: H01L

Abstract:
1. An electrostatic discharge device comprising: a semiconductor substrate of a first conduction type; first and second wells of a second conduction type opposite to said first conduction type, each of said first and second wells including a first diffusion region of said first conduction type and a second diffusion region of said second conduction type, said second diffusion region in said first well being connected to said first diffusion region in said second well; and a third well of said first conduction type located between said first well and said second well, wherein said first, second and third wells cooperate with one another to perform a bipolar action; a fourth well of said second conduction type including a first diffusion region of said first conduction type and a second diffusion region of said second conduction type, said first diffusion region in said fourth well being connected to said second diffusion region in said second well; and a fifth well of said first conduction type located between said second well and said fourth well, wherein a voltage applied to said first diffusion region of said first well is higher than a voltage applied to said second diffusion region of said fourth well, and wherein said fifth well is free from a diffusion region of said first conductive type therein.