Patent ID: 8618904
Filing Date: 2013-12-31
Classification: H01T

Abstract:
1. An ESD protection device comprising: a ceramic multilayer substrate including a plurality of ceramic insulating layers laminated on each other; a first connecting conductor that has electrical conductivity and completely fills a via hole which penetrates through at least one of the plurality of ceramic insulating layers; a mixture portion that extends along one of the main surfaces of the at least one of the plurality of ceramic insulating layers including the first connecting conductor and is connected to the first connecting conductor, the mixture portion including a material dispersed therein, the material including at least one selected from (i) a metal and a semiconductor, (ii) a metal and a ceramic, (iii) a metal, a semiconductor, and a ceramic, (iv) a semiconductor and a ceramic, (v) a semiconductor, (vi) a metal coated with an inorganic material, (vii) a metal coated with an inorganic material and a semiconductor, (viii) a metal coated with an inorganic material and a ceramic, and (ix) a metal coated with an inorganic material, a semiconductor, and a ceramic; and a second connecting conductor that has electrical conductivity, is separated from the first connecting conductor, is connected to the mixture portion, and extends along the main surface of the at least one of the plurality of ceramic insulating layers on which the mixture portion is provided.