A multilayer electronic component includes a body including a dielectric layer and first and second internal electrodes disposed with the dielectric layer interposed therebetween in a first direction, first and second side margin portions respectively disposed on surfaces of the body in a third direction, and external electrodes respectively disposed on surfaces of the body in a second direction. The first side margin portion includes first dielectric grains, the dielectric layer includes second dielectric grains, and in cross-sections of the first side margin portion and the body in the first and third directions, a ratio of a major axis length to a minor axis length of the first dielectric grain is 3 or greater and 30 or less, and a ratio of a major axis length to a minor axis length of the second dielectric grain is 1.5 or less.

A multilayer electronic component includes a body including a dielectric layer and a first internal electrode and a second internal electrode having first to sixth surfaces, a first external electrode including a first connection portion on the third surface, a first band portion on a portion of the first surface, and a third band portion on a portion of the second surface, a second external electrode including a second connection portion on the fourth surface, a second band portion on a portion of the first surface, and a fourth band portion on a portion of the second surface, an insulating layer disposed on the first and second connection portions and covering the second surface and the third and fourth band portions, a first plating layer disposed on the first band portion, and a second plating layer disposed on the second band portion. The insulating layer includes an oxide containing Ba.

A multilayer electronic component includes: a body including a dielectric layer and first and second internal electrodes, and including first to sixth surfaces; a first external electrode including a first connection portion on the third surface, a first band portion extending from the first connection portion onto the first surface, and a third band portion extending from the first connection portion onto the second surface; a second external electrode including a second connection portion on the fourth surface, a second band portion extending from the second connection portion onto the first surface, and a fourth band portion extending from the second connection portion onto the second surface; an insulating layer including oxide including aluminum (Al), disposed on the first and second connection portions, and covering the second surface and the third and fourth band portions; and first and second plating layers respectively disposed on the first and second band portions.

A multilayer electronic component includes a body having a dielectric layer and first and second internal electrodes alternately disposed with the dielectric layer interposed therebetween. The body has a hexahedral shape. A first external electrode includes a first connection portion disposed on a third surface, and first and third band portions extending from the first connection portion respectively onto a portion of a first and a second surface. A second external electrode includes a second connection portion disposed on a fourth surface, and second and fourth band portions extending from the second connection portion respectively onto a portion of the first and second surfaces. An insulating layer including an oxide containing hafnium is disposed on the first and second connection portions and covers the second surface and the third and fourth band portions. First and second plating layers are disposed respectively on the first and second band portions.

A multilayer electronic component includes: a body having first and second surfaces opposing each other in a first direction and third and fourth surfaces connected to the first and second surfaces and opposing each other in a second direction; a first external electrode including a first connection portion, disposed on the third surface, and a first band portion extending from the first connection portion onto a portion of the first surface; a second external electrode including a second connection portion, disposed on the fourth surface, and a second band portion extending from the second connection portion onto a portion of the first surface; an insulating layer disposed on the second surface to extend to portions of the first and second connection portions; a first plating layer disposed on the first band portion; and a second plating layer disposed on the second band portion. The insulating layer includes a polymer resin.

A multilayer electronic component includes: a body including a dielectric layer and first and second internal electrodes and having first to sixth surfaces; a first external electrode including a first connection portion on the third surface, a first band portion on the first surface, and a third band portion on the second surface; a second external electrode including a second connection portion on the fourth surface, a second band portion on the first surface, and a fourth band portion on the second surface; an insulating layer disposed on the first and second connection portions and covering the second surface, and third and fourth band portions; and first and second plating layers respectively disposed on the first and second band portions. The insulating layer includes an oxide containing Ti. The dielectric layer includes one of BaTiO.sub.3, (Ba.sub.1-xCa.sub.x) TiO.sub.3 (0<x<1) , Ba(Ti.sub.1-yCa.sub.y)O.sub.3 (0<y<1) , (Ba.sub.1-xCa.sub.x) (Ti.sub.1-yZr.sub.y)O.sub.3 (0<x<1, 0<y<1) and Ba(Ti.sub.1-yZr.sub.y)O.sub.3 (0<y<1) as a main component.

An energy storage element and method of fabrication thereof are disclosed. An energy storage element includes a set of electrodes where one or more electrodes have extended conductive paths through nano-channel electric interconnections with ceramic particles in one or more dielectric layers. The electrode's electric field is extended into the dielectric material providing increased capacitance. The set of electrodes can include a pair of electrode layers respectively attached directly to opposing sides of one dielectric layer. The set of electrodes, which can also be referred to as multi-layer electrodes, can include a plurality of electrode layers interleaved between, and directly attached to, a plurality of stacked dielectric layers.

A ceramic electronic component includes a body including a dielectric layer and a plurality of internal electrodes stacked in a first direction with the dielectric layer interposed therebetween and including first and second surfaces opposing each other in the first direction and side surfaces connected to the first and second surfaces, an external electrode disposed on one of the side surfaces of the body extending onto a portion of the first surface of the body, and an insulating layer covering a surface of the external electrode and including a plurality of openings exposing the external electrode, wherein a ratio of an area of the plurality of openings to an area of the surface of the external electrode covered by the insulating layer is 20% to 70%.

A multi-layer ceramic electronic component includes a multi-layer unit and a side margin. The multi-layer unit includes a functional unit including internal electrodes laminated in a first direction, and a pair of covers that covers the functional unit from both sides in the first direction, the multi-layer unit satisfying a relationship of (2*t2)/t1≥0.6, where t1 represents a dimension of the functional unit in the first direction and t2 represents a dimension of each of the pair of covers in the first direction. The side margin covers the multi-layer unit in a second direction orthogonal to the first direction.

A selection method includes: obtaining or providing multilayer ceramic capacitors each having a multilayer structure in which each of a plurality of ceramic dielectric layers and each of a plurality of internal electrode layers are alternately stacked; measuring a ratio of (a current value at 10 V/μm when a direct voltage is applied to a plurality of ceramic dielectric layers at 125 degrees C.)/(a current value at 10 V/μm when a direct voltage is applied to the plurality of the ceramic dielectric layers at 85 degrees C.), with respect to each multilayer ceramic capacitor; determining whether the ratio is in a predetermined range; and selecting a multilayer ceramic capacitor or multilayer ceramic capacitors each having a ratio in the predetermined range as a desired multilayer ceramic capacitor.