Abstract: A multilayer capacitor includes a body including a multilayer structure in which a plurality of dielectric layers are stacked in a first direction and a plurality of internal electrodes stacked with the dielectric layer interposed therebetween and external electrodes formed outside the body and connected to the internal electrodes. The body includes an active portion and a side margin portion covering the active portion and opposing each other in a second direction, and 1<A2/M1?1.5 and A2<A1 in which A1 is an average grain size of the dielectric layers in a central region of the active portion, A2 is an average grain size of the dielectric layers at an active boundary part of the active portion adjacent to the side margin portion, and M1 is an average grain size of the dielectric layers in a central region of the side margin portion.

Abstract: A multilayer electronic component includes a body including a plurality of dielectric layers, side margin portions disposed on the body, and external electrodes disposed on the body. The reliability of the multilayer electronic component is improved by controlling the contents of Si for each position of the dielectric layer and the side margin portion.

Abstract: A dielectric composition and a multilayer capacitor including the same are provided. The dielectric composition includes a BaTiO3-base main component, a first subcomponent including an Nb component and a Gd component, a second subcomponent including an Mg component, and a third subcomponent including a Ba component and a Ca component. The first subcomponent is included in an amount of 4 moles or less per 100 moles of the main component. In the first subcomponent, a molar content of Nb and a molar content of Gd satisfy 0.33?Nb/Gd, and in the third subcomponent, a molar content of Ba and a molar content of Ca satisfy 0.2?Ca/(Ba+Ca).

Abstract: A multilayer ceramic electronic component includes: a ceramic body including a dielectric layer having a main component represented by (Ba1-xCax)(Ti1-y(Zr, Sn, Hf)y)O3 (where, 0?x?1, 0?y?0.5), and having a plurality of grains and grain boundaries disposed between the plurality of grains, and including first and second internal electrodes alternately stacked with the dielectric layer interposed therebetween; a first external electrode; and a second external electrode, wherein the dielectric layer includes a triple point in contact with three grain boundaries and a secondary phase of Si disposed inside the triple point, wherein a dispersion of an Si content at an interface between the dielectric layer and the internal electrode may be 1% by weight or less.

Abstract: A dielectric composition includes one of BaTiO3, (Ba,Ca)(Ti,Ca)O3, (Ba,Ca)(Ti,Zr)O3, Ba(Ti,Zr)O3 and (Ba,Ca)(Ti,Sn)O3, as a main component, a first subcomponent including a rare earth element, and a second subcomponent including at least one of a variable valence acceptor element and a fixed valence acceptor element. When a sum of contents of the rare earth element is defined as DT and a sum of contents of the variable valence acceptor element and the fixed valence acceptor element is defined as AT, (DT/AT)/(Ba+Ca) satisfies more than 0.5 and less than 6.0. In addition, a multilayer electronic component including the dielectric composition is provided.

Abstract: A dielectric ceramic composition and a multilayer ceramic capacitor including the same are provided. The dielectric ceramic composition includes a BaTiO3-based base material main ingredient and an accessory ingredient, where the accessory ingredient includes dysprosium (Dy) and niobium (Nb) as first accessory ingredients. A total content of the Dy and Nb is greater than 0.2 mol and less than or equal to 1.5 mol based on 100 mol of titanium (Ti) of the base material main ingredient.

Abstract: A multilayer electronic component includes: a body including dielectric layers; side margin portions disposed on side surfaces of the body, respectively; and external electrodes disposed on end surfaces of the body, respectively. The body includes a capacitance forming portion including internal electrodes disposed alternately with the dielectric layers and cover portions disposed on upper and lower surfaces of the capacitance forming portion, respectively. Ga2/Ga1 is 0.8 or more and less than 1.0 and Ga2/Gc1 is 0.8 or more and less than 1.0. a1 is a central portion of the capacitance forming portion, a2 is a boundary portion between the capacitance forming portion and the cover portion in the capacitance forming portion, and c1 is a boundary portion between the capacitance forming portion and the cover portion in the cover portion. Ga1, Ga2, and Gc1 are average sizes of dielectric grains at a1, a2, and c1, respectively.

Abstract: A dielectric ceramic composition and a multilayer ceramic capacitor including the same are provided. The dielectric ceramic composition includes a BaTiO3-based base material main ingredient and an accessory ingredient, where the accessory ingredient includes dysprosium (Dy) and niobium (Nb) as first accessory ingredients. A total content of the Dy and Nb is greater than 0.2 mol and less than or equal to 1.5 mol based on 100 mol of titanium (Ti) of the base material main ingredient.

Abstract: A dielectric composition and a multilayer capacitor including the same are disclosed. The dielectric composition including: a BaTiO3-based main ingredient; a first auxiliary ingredient including rare earth elements; and a second auxiliary ingredient including at least one of Ba and Ca but essentially including Ba, wherein the rare earth elements include Tb and Dy, and the first auxiliary ingredient and the second auxiliary ingredient satisfy a molar content condition of 0.40<(Tb/T_RE)*(Ba+Ca)<0.93, where T_RE is a total molar content of the rare earth elements in the first auxiliary ingredient.

Abstract: A dielectric composition and a multilayer capacitor including the same are disclosed. The dielectric composition including a BaTiO3-based main ingredient, and an auxiliary ingredient including rare earth elements, wherein the rare earth elements include Dy and Eu, Dy and Eu molar contents based on 100 moles of the BaTiO3-based main ingredient satisfy conditions of 0.10<Eu/(Dy+Eu)?0.50 and 0.60?Dy+Eu?1.0, and the rare earth elements do not include another element in a higher molar content than Dy and Eu.

Abstract: A method of measuring a retinal layer includes obtaining an OCT layer image of a retina, detecting a reference boundary line indicating a retinal layer in the obtained OCT image, obtaining an aligned OCT image by aligning a vertical position of each column of the OCT image so that the detected reference boundary line becomes a baseline, predicting retinal layer regions from the aligned OCT image, calculating boundary lines between the predicted retinal layer regions, and restoring the calculated boundary lines to positions of the boundary lines of the retinal layer of the original OCT image by aligning the vertical positions of the calculated boundary lines of the retinal layer for each column so that the baseline becomes the reference boundary line again.

Abstract: A method for differentiating retinal layers includes obtaining an optical coherence tomography retinal layer image of an eye to be examined and inputting it into a deep neural network, calculating probability P that each pixel is included in each layer from the inputted layer image, calculating probability P1(x,y) that a pixel is in or above (k?1)-th layer and probability P2(x,y) that the pixel is in or below k-th layer from probabilities P(x,y) that the pixel is included in each layer, calculating probability Fk?1,k(x,y) that the pixel becomes a boundary line between the (k?1)-th layer and the k-th layer from P1(x,y) and P2(x,y), obtaining a node cost Ck?1,k(x,y) of the pixel by multiplying Fk?1,k(x,y) with an image brightness change ?I at the pixel, and determining the boundary line between the (k?1)-th and k-th layers by connecting coordinates (x,y) of the pixels where Ck?1,k(x,y) calculated for each position x is the maximum.

Abstract: A multilayer ceramic electronic component includes: a ceramic body including a dielectric layer having a main component represented by (Ba1-xCax)(Ti1-y)(Zr, Sn, Hf)y)O3 (where, 0?x?1, 0?y?0.5), and having a plurality of grains and grain boundaries disposed between the plurality of grains, and including first and second internal electrodes alternately stacked with the dielectric layer interposed therebetween; a first external electrode; and a second external electrode, wherein the dielectric layer includes a triple point in contact with three grain boundaries and a secondary phase of Si disposed inside the triple point, wherein a dispersion of an Si content at an interface between the dielectric layer and the internal electrode may be 1% by weight or less.

Abstract: A multilayer electronic component includes a body including a plurality of dielectric layers, side margin portions disposed on the body, and external electrodes disposed on the body. The reliability of the multilayer electronic component is improved by controlling the contents of Si for each position of the dielectric layer and the side margin portion.

Abstract: A dielectric composition and a multilayer capacitor including the same are provided. The dielectric composition includes a BaTiO3-base main component, a first subcomponent including an Nb component and a Gd component, a second subcomponent including an Mg component, and a third subcomponent including a Ba component and a Ca component. The first subcomponent is included in an amount of 4 moles or less per 100 moles of the main component. In the first subcomponent, a molar content of Nb and a molar content of Gd satisfy 0.33?Nb/Gd, and in the third subcomponent, a molar content of Ba and a molar content of Ca satisfy 0.2?Ca/(Ba+Ca).

Abstract: A dielectric composition includes one of BaTiO3, (Ba,Ca)(Ti,Ca)O3, (Ba,Ca)(Ti,Zr)O3, Ba(Ti,Zr)O3 and (Ba,Ca)(Ti,Sn)O3, as a main component, a first subcomponent including a rare earth element, and a second subcomponent including at least one of a variable valence acceptor element and a fixed valence acceptor element. When a sum of contents of the rare earth element is defined as DT and a sum of contents of the variable valence acceptor element and the fixed valence acceptor element is defined as AT, (DT/AT)/(Ba+Ca) satisfies more than 0.5 and less than 6.0. In addition, a multilayer electronic component including the dielectric composition is provided.

Abstract: A dielectric composition includes one of BaTiO3, (Ba,Ca) (Ti,Ca)O3, (Ba,Ca) (Ti,Zr)O3, Ba(Ti,Zr)O3 and (Ba,Ca) (Ti,Sn)O3, as a main component, a first subcomponent including a rare earth element, and a second subcomponent including at least one of a variable valence acceptor element and a fixed valence acceptor element. When a sum of contents of the rare earth element is defined as DT and a sum of contents of the variable valence acceptor element and the fixed valence acceptor element is defined as AT, (DT/AT)/(Ba+Ca) satisfies more than 0.5 and less than 6.0. In addition, a multilayer electronic component including the dielectric composition is provided.

Abstract: A multilayer electronic component includes: a body including dielectric layers; side margin portions disposed on side surfaces of the body, respectively; and external electrodes disposed on end surfaces of the body, respectively. The body includes a capacitance forming portion including internal electrodes disposed alternately with the dielectric layers and cover portions disposed on upper and lower surfaces of the capacitance forming portion, respectively. Ga2/Ga1 is 0.8 or more and less than 1.0 and Ga2/Gc1 is 0.8 or more and less than 1.0. a1 is a central portion of the capacitance forming portion, a2 is a boundary portion between the capacitance forming portion and the cover portion in the capacitance forming portion, and c1 is a boundary portion between the capacitance forming portion and the cover portion in the cover portion. Ga1, Ga2, and Gc1 are average sizes of dielectric grains at a1, a2, and c1, respectively.

Abstract: A multilayer capacitor includes a body including a multilayer structure in which a plurality of dielectric layers are stacked in a first direction and a plurality of internal electrodes stacked with the dielectric layer interposed therebetween and external electrodes formed outside the body and connected to the internal electrodes. The body includes an active portion and a side margin portion covering the active portion and opposing each other in a second direction, and 1<A2/M1?1.5 and A2<A1 in which A1 is an average grain size of the dielectric layers in a central region of the active portion, A2 is an average grain size of the dielectric layers at an active boundary part of the active portion adjacent to the side margin portion, and M1 is an average grain size of the dielectric layers in a central region of the side margin portion.

Abstract: A dielectric ceramic composition and a multilayer ceramic capacitor including the same are provided. The dielectric ceramic composition includes a BaTiO3-based base material main ingredient and an accessory ingredient, where the accessory ingredient includes dysprosium (Dy) and niobium (Nb) as first accessory ingredients. A total content of the Dy and Nb is greater than 0.2 mol and less than or equal to 1.5 mol based on 100 mol of titanium (Ti) of the base material main ingredient.