Patent ID: 7285837

Claim:
A structure of an electrostatic discharge device integrated with a pad, said structure comprising: a P-type substrate; an N-well, formed in said P-type substrate as a part of said electrostatic discharge device; at least one first N+ region formed outside said N-well, said first N+ region being isolated from said N-well and regions herein, and other doped regions in said P-type substrate by field oxides; at least one first P+ region formed outside said N-well, said first P+ region being isolated from said N-well and regions herein, other doped regions in said P-type substrate, and said first N+ region by field oxides; at least one second N+ region formed inside said N-well; at least one second P+ region formed inside said N-well, wherein said second N+ region and said second P+ region are formed next to each other; a first electrode, connecting at least one second N+ region and at least one second P+ region via an electric conductor, which comprises metal; and a second electrode, connecting said first P+ region and said first N+ region via another electric conductor, which comprises metal, wherein the structure of said electrostatic discharge device is formed under an area of said pad and covered by said pad.