Esd protection device

Abstract

Provided is an ESD protection device that can suppress degradation of discharge characteristics caused by repeated discharge. The ESD protection device comprises (a) a ceramic multilayer substrate 12 in which a plurality of ceramic layers are stacked, (b) a cavity 13 formed inside the ceramic multilayer substrate 12, (c) at least one pair of discharge electrodes 14, 15 including opposing portions 14t, 15t that are formed along an inner surface of the cavity 13 and that face each other with a spacing held therebetween, and (d) outer electrodes formed on a surface of the ceramic multilayer substrate 12 and connected to the discharge electrodes 14, 15. At least one of the opposing portions 14t, 15t of the discharge electrodes 14, 15 is connected to one end portion of a via conductor 22, 23 penetrating through the ceramic layer of the ceramic multilayer substrate 12.

Dependencies are inferred from the claim text.