Multi-layered capacitor and method for manufacturing same
AssigneesSamsung Electro-Mechanics Co., Ltd., Industry-University Cooperation Foundation Korea Aerospace University
InventorsJooyoung Kim, Do-Kyun Kwon, Jaehoon Ji, Eunyoung Lee
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Abstract
A multi-layered capacitor including a capacitor body including a dielectric layer and an internal electrode; and an external electrode disposed on an outer side of the capacitor body, wherein the dielectric layer includes a plurality of dielectric crystal grains, and the dielectric crystal grains include a core containing BaTiO3, a first shell disposed on the core and containing BaTiO3 doped with a first doping element of Sr, Ca, Bi, K, Na, or a combination thereof, and a second shell disposed on the first shell and containing a first coating element of Nb, Ta, or a combination thereof.
Claims20
A multi-layered capacitor comprising:
- a capacitor body comprising a dielectric layer and an internal electrode;
- and
- an external electrode disposed on an outer side of the capacitor body,
- wherein the dielectric layer comprises a plurality of dielectric crystal grains, and
- wherein the plurality of dielectric crystal grains comprise a core including BaTiO3, a first shell disposed on the core and including BaTiO3 doped with a first doping element selected from Sr, Ca, Bi, K, Na, or a combination thereof, and a second shell disposed on the first shell and including a first coating element selected from Nb, Ta, or a combination thereof.
A method of manufacturing a multi-layered capacitor, the method comprising:
- manufacturing a dielectric powder;
- manufacturing a dielectric green sheet from the dielectric powder;
- forming a conductive paste layer on a surface of the dielectric green sheet;
- manufacturing a dielectric green sheet laminate by stacking a plurality of the dielectric green sheets, each of which has the conductive paste layer formed thereon;
- firing the dielectric green sheet laminate to manufacture a capacitor body comprising a dielectric layer and an internal electrode;
- and
- forming an external electrode on one surface of the capacitor body,
- wherein the dielectric layer comprises a plurality of dielectric crystal grains, and
- wherein the plurality of dielectric crystal grains comprise a core including BaTiO3, a first shell disposed on the core and including BaTiO3 doped with a first doping element selected from Sr, Ca, Bi, K, Na, or a combination thereof, and a second shell disposed on the first shell and including a first coating element selected from Nb, Ta, or a combination thereof.
Dependencies are inferred from the claim text.