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US 10,319,527 B2Granted
Multilayer capacitor
AssigneeSamsung Electro-Mechanics Co., Ltd.
InventorsJung Min Kim, Bon Seok Koo, Chang Hak Choi, Hae Sol Kang, Ji Hye Han, Byung Woo Kang
Life of this patent
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Abstract
A multilayer capacitor may have a decreased equivalent series resistance (ESR) and improved warpage strength and reliability with conductive resin layers of external electrodes on surfaces where internal electrodes are exposed from a body, intermetallic compounds are in contact with conductive connecting portions of the conductive resin layers and the internal electrodes, and conductive connecting portions are in contact with a plurality of metal particles and second electrode layers.
Claims48
A multilayer capacitor comprising:
- a body, including a plurality of first and second internal electrodes alternately stacked with dielectric layers interposed therebetween, having first and second surfaces opposing each other, third and fourth surfaces opposing each other and connected to the first and second surfaces, and fifth and sixth surfaces opposing each other, connected to the first and second surfaces, and connected to the third and fourth surfaces, and including a plurality of first and second groove portions in the third and fourth surfaces between dielectric layers, wherein the dielectric layers are perpendicular to the third and fourth surfaces, and end portions of the first and second internal electrodes are exposed from the body through the first and second groove portions, respectively;
- intermetallic compounds in the first and second groove portions and connected to the end portions of the first and second internal electrodes, respectively;
- moisture permeation prevention layers on the first and second surfaces of the body, respectively;
- and
- first and second external electrodes on the third and fourth surfaces of the body, respectively,
- wherein the first and second external electrodes include:
- conductive resin layers disposed on the third and fourth surfaces of the body, respectively, and including a plurality of metal particles, conductive connecting portions surrounding the plurality of metal particles and in contact with the intermetallic compounds, and base resin;
- and
- first electrode layers on the respective conductive resin layers and in contact with the conductive connecting portions, and
- wherein the moisture permeation prevention layers are each between the body and the conductive resin layers of the first and second external electrodes.
7 more elements
A multilayer capacitor comprising:
- a body, including a plurality of first and second internal electrodes alternately stacked with dielectric layers interposed therebetween, and having first and second surfaces opposing each other, third and fourth surfaces opposing each other and connected to the first and second surfaces, and fifth and sixth surfaces opposing each other, connected to the first and second surfaces, and connected to the third and fourth surfaces, wherein end portions of the first and second internal electrodes are exposed from the body at the third and fourth surfaces, respectively;
- intermetallic compounds connected to the end portions of the first and second internal electrodes, respectively;
- moisture permeation prevention layers on the first and second surfaces of the body, respectively;
- and
- first and second external electrodes on the third and fourth surfaces of the body, respectively,
- wherein the first and second external electrodes include:
- conductive resin layers on the third and fourth surfaces of the body, respectively, and including a plurality of metal particles, conductive connecting portions surrounding the plurality of metal particles and in contact with the intermetallic compounds, and base resin;
- and
- first electrode layers on the respective conductive resin layers and in contact with the conductive connecting portions, and
- wherein the moisture permeation prevention layers are each between the body and the conductive resin layers of the first and second external electrodes.
7 more elements
A multilayer capacitor, comprising:
- a body including a plurality of internal electrodes, wherein the plurality of internal electrodes are exposed from the body via a plurality of groove portions in a first surface of the body;
- an external electrode electrically connected to the plurality of internal electrodes and including a conductive resin layer on the first surface of the body and a first electrode layer on the conductive resin layer;
- and
- a moisture permeation prevention layer between the body and the conductive resin layer of the external electrode,
- wherein the body includes intermetallic compounds in the plurality of groove portions and in contact with the respective plurality of internal electrodes, and
- wherein the conductive resin layer includes a base resin and conductive connecting portions electrically connecting the first electrode layer to the intermetallic compounds in the plurality of groove portions.
3 more elements
A method of manufacturing a multilayer capacitor, comprising the steps of:
- forming a body by stacking and sintering a plurality of ceramic green sheets on which internal electrodes are printed;
- applying a conductive resin composite on opposing surfaces of the body to form a conductive resin layer, the conductive resin composite including first metal particles covered by oxide films, second metal particles comprising low melting point metal and covered by oxide films, and a base resin;
- removing the oxide films to allow the low melting point metal to flow within the conductive resin layer;
- forming a first electrode layer on the conductive resin layer.
1 more element
Dependencies are inferred from the claim text.