Patent ID: 7291918

Claim:
A layout structure coupled with an ESD protection device, the layout structure comprising: a first electrically conductive layer, which is disposed on the ESD protection device and electrically connected to the ESD protection device, wherein the first electrically conductive layer comprises: a first pattern electrically connected to a first terminal of the ESD protection device; and a second pattern electrically connected to a second terminal of the ESD protection device; and a second electrically conductive layer, which is disposed on the first electrically conductive layer and electrically connected to the first electrically conductive layer, and a width or a projection area of the second electrically conductive layer is less than that of the first electrically conductive layer, wherein the second electrically conductive layer comprises: a third pattern electrically connected to the first pattern, and a width or a projection area of the third pattern is less than that of the first pattern; and a fourth pattern electrically connected to the second pattern, and a width or a projection area of the fourth pattern is less than that of the second pattern.