Multilayered capacitor and manufacturing method thereof
AssigneeSamsung Electro-Mechanics Co., Ltd.
InventorsMyungwoo Lee, Haesol Jung, Jinseong Kim, Bo Young Kim, Hyojin Kim
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Abstract
A multilayered capacitor includes a capacitor body including a dielectric layer and an internal electrode, and an external electrode outside the capacitor body, wherein the dielectric layer includes a plurality of dielectric crystal grains, the dielectric crystal grains include barium titanate as a main component, a mole ratio of barium to titanium (Ba/Ti mole ratio) at a center of the dielectric crystal grains is about 0.9797 to about 0.9943, and a coefficient of variation (standard deviation of size/D50) of the dielectric crystal grain size is about 30% and about 43%.
Claims16
A multilayered capacitor, comprising
- a capacitor body including a dielectric layer and an internal electrode, and
- an external electrode outside the capacitor body,
- wherein the dielectric layer includes a plurality of dielectric crystal grains,
- at least one the plurality of dielectric crystal grains includes barium titanate as a main component, a mole ratio of barium to titanium (Ba/Ti mole ratio) at a center of at least one of the plurality of dielectric crystal grains is about 0.9797 to about 0.9943,
- a coefficient of variation (standard deviation of size/D50) of the plurality of dielectric crystal grain is between about 30% and about 43%, and
- the dielectric crystal grains include about 0.1 to about 1.0 part by mole of Dy2O3, about 0.1 to about 1.0 part by mole of Tb2O3, 0 to about 0.2 parts by mole of MnO2, 0 to about 0.15 parts by mole of V2O5, about 1.5 to about 3.3 parts by mole of BaCO3, about 0.5 to about 4.0 parts by mole of SiO2, about 0.4 to about 0.6 parts by mole of Al2O3, and about 0 to about 0.8 parts by mole of CaCO3 as a subcomponent based on 100 parts by mole of the main component.
Dependencies are inferred from the claim text.