| CPC H01G 4/30 (2013.01) [C04B 35/4682 (2013.01); H01G 4/008 (2013.01); H01G 4/012 (2013.01); H01G 4/1218 (2013.01); C04B 2235/66 (2013.01)] | 10 Claims |
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1. A ceramic electronic device comprising:
a multilayer structure having a parallelepiped shape in which a plurality of dielectric layers and a plurality of internal electrode layers are alternately stacked in a vertical direction, the plurality of internal electrode layers being alternately exposed to two end faces of the parallelepiped shape, a main component of the plurality of dielectric layers being a ceramic; and
a pair of external electrodes that are respectively provided on the two end faces so as to be respectively connected to the plurality of internal electrode layers that are exposed at the corresponding end faces alternately,
wherein the multilayer structure has a pair of side margin sections, each side margin section being a section covering one of two lateral edges of the plurality of internal electrode layers in an extension direction toward two side faces of the parallelepiped shape,
wherein each of the side margin sections has a structure in which a plurality of dielectric layers, each containing a ceramic as a main component, and a plurality of conductive layers, each containing a metal as a main component, are alternately stacked in the vertical direction,
wherein the plurality of conductive layers in each of the side margin sections are respectively spaced and separated from the plurality of internal electrode layers,
wherein each of the pair of external electrodes extends from the corresponding end face to the two side faces so as to cover a part of the two side faces adjacent to the end face,
wherein each of the conductive layers in each of the side margin sections extends inwardly from the two end faces in inward directions normal to the end faces beyond the parts of the side faces covered by the respective external electrodes,
wherein in each of the side margin sections, the plurality of conductive layers include a plurality of first conductive layers and a plurality of second conductive layers,
wherein in each of the side margin sections, the plurality of first conductive layers are respectively located at the same heights as the plurality of internal electrode layers and are connected to one of the pair of external electrodes, thereby the first conductive layers being disposed in both side margin sections on both sides of the plurality of internal electrode layers, respectively,
wherein in each of the side margin sections, the plurality of second conductive layers are respectively located at the same heights as the plurality of internal electrode layers and are connected to another of the pair of external electrodes, thereby the second conductive layers being disposed in both side margin sections on both sides of the plurality of internal electrode layers, respectively,
wherein in each of the side margin sections, each pair of the first conductive layer and the second conductive layer that are located at the same height has an insulation gap therebetween so as not to short the pair of external electrodes, and
wherein in each of the side margin sections, the insulating gap provided between the first conductive layer and the second conductive layer that are located at the same height is positioned at a location that deviates from a center of the multilayer structure along a direction from the one of the pair of external electrodes to the another.
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