Patent ID: 7894172
Filing Date: 2011-02-22
Classification: H01L,H05K

Abstract:
1. An electrostatic discharge (ESD) protection structure, comprising: a substrate comprising a first voltage variable material and having a first surface, a second surface substantially paralleled to the first surface and a via connecting the first and second surfaces; and a first metal layer disposed in the substrate for coupling to a ground terminal, wherein the first voltage variable material is in a conductive state when an ESD event occurs, such that the via is electrically connected with the first metal layer to form a discharge path, and the first voltage variable material is in an isolation state when the ESD event is absent, such that the via is electrically isolated from the first metal layer; wherein the substrate further comprises at least a first insulation dielectric material without the voltage variable material characteristics, and the first insulation dielectric material is adjacent to the first voltage variable material.