Patent ID: 8503147
Filing Date: 2013-08-06
Classification: H05K

Abstract:
1. An ESD protection device comprising: a ceramic multilayer substrate including a plurality of laminated insulating layers made of a ceramic material; at least one external electrode provided on a side surface of the ceramic multilayer substrate so as to be exposed outside of the ceramic multilayer substrate; at least one of an in-plane connecting conductor provided along a first principal surface of one of the plurality of insulating layers and an interlayer connecting conductor arranged so as to penetrate between the first principal surface and a second principal surface of the one of the plurality of insulating layers, the in-plane connecting conductor and the interlayer connecting conductor having conductivity; and a mixture portion provided along the first principal surface of the insulating layer and including a dispersed material including at least one of metal and semiconductor; metal and ceramic; metal, semiconductor, and ceramic; semiconductor and ceramic; semiconductor; metal coated with an inorganic material; metal coated with an inorganic material and semiconductor; metal coated with an inorganic material and ceramic; and metal coated with an inorganic material, semiconductor, and ceramic; wherein the mixture portion is connected to the at least one external electrode and the at least one of the in-plane connecting conductor and the interlayer connecting conductor.