Patent ID: 8773824
Filing Date: 2014-07-08
Classification: H01T

Abstract:
1. An ESD protection device comprising: a ceramic base material including a glass component; a first opposed electrode on one side of the ceramic base material and a second opposed electrode on another side of the ceramic base material, the first and second opposed electrodes being arranged so as to be opposed to each other and be spaced apart from each other with a distance therebetween on a surface of the ceramic base material; and a discharge auxiliary electrode connected to each of the first and second opposed electrodes, the discharge auxiliary electrode being arranged so as to provide a bridge from the first opposed electrode to the second opposed electrode; wherein a sealing layer to prevent ingress of the glass component from the ceramic base material into the discharge auxiliary electrode is provided between the discharge auxiliary electrode and the ceramic base material; the first and second opposed electrodes, the discharge auxiliary electrode, and the sealing layer are disposed on an outer surface of the ceramic base material; and a reactive layer including a reaction product produced by a reaction between a component material of the sealing layer and a component material of the ceramic base material is provided at an interface between the sealing layer and the ceramic base material.