Multilayered capacitor and method for manufacturing the same
AssigneeSamsung Electro-Mechanics Co., Ltd.
InventorsSeonho Park, Jaeseok Yi, Sunghyung Kang, Kunhoi Koo
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Abstract
A multilayered capacitor includes a capacitor body in which dielectric layers and internal electrodes are stacked in a first direction, and an external electrode disposed on the capacitor body. The external electrode includes a first layer including a first conductive metal, and a second layer disposed on the first layer and including an alloy of a second conductive metal and a low melting point metal having a melting point lower than that of the second conductive metal and having a plurality of pores, and an area ratio of pores in a unit area of the second layer to a unit area of the second layer is greater than or equal to about 30%.
Claims16
A multilayered capacitor, comprising:
- a capacitor body in which dielectric layers and internal electrodes are stacked in a first direction, and
- an external electrode disposed on the capacitor body,
- wherein the external electrode includes:
- a first layer disposed on the capacitor body and including a first conductive metal, and
- a second layer disposed on the first layer and including an alloy of a second conductive metal and a low melting point metal having a melting point lower than that of the second conductive metal and having a plurality of pores, and
- in a cross section in the first direction and a third direction from a center of the capacitor body in a second direction, an area ratio of pores in a unit area of the second layer to the unit area of the second layer is greater than or equal to about 30% and a remaining portion other than the pores in the unit area includes only the alloy, the second direction and the third direction being perpendicular to the first direction and being perpendicular to each other.
A method of manufacturing a multilayered capacitor, comprising:
- preparing a capacitor body in which dielectric layers and internal electrodes are stacked in a first direction, and
- forming an external electrode on of the capacitor body,
- wherein the forming of the external electrode includes:
- coating a first layer paste including a first conductive metal on the capacitor body and then sintering the first layer paste to form a first layer, and
- coating a second layer paste including a second conductive metal and a low melting point metal having a lower melting point than the second conductive metal on the first layer and then sintering the second layer paste to form a second layer, and
- wherein the external electrode includes:
- the first layer disposed on the capacitor body and including the first conductive metal, and
- the second layer disposed on the first layer and including an alloy of the second conductive metal and the low melting point metal and having a plurality of pores, and
- in a cross section in the first direction and a third direction from a center of the capacitor body in a second direction, an area ratio of pores in a unit area of the second layer to the unit area of the second layer is greater than or equal to about 30% and a remaining portion other than the pores in the unit area includes only the alloy, the second direction and the third direction being perpendicular to the first direction and being perpendicular to each other.
Dependencies are inferred from the claim text.