Murata Manufacturing Co., Ltd.

Murata Manufactruing Co., Ltd.

Kota Zenzai

Seiji Katsuta

Kenichi Hamanaka

Shinji Otani

Kiyoyasu Sakurada

Naoki Shimizu

Hisayoshi Omori

Takashi Kanayama

Kiyotaka Maegawa

Taku Dekura

Yosuke Terashita

Jun Ikeda

Atsushi Ishida

Yutaka Ota

Masato Kimura

Atsushi Nakamoto

Hidetaka Sugiyama

Takayoshi Yamamoto

A method for manufacturing a ceramic electronic chip including an outer electrode including a glass-free sintered layer containing no glass. The method includes providing a glass-free conductive paste including a conductive metal powder and a thermosetting resin, the conductive metal powder including an alloy of tin and at least one of copper and nickel, and the glass-free conductive paste containing no glass, and applying this composition to cover a portion of a surface of a ceramic body. Then the ceramic body to which the glass-free conductive paste has been applied is subjected to a heat treatment at a temperature of about° C., higher than or equal to a temperature about° C. higher than the curing temperature of the thermosetting resin. By the heat treatment, little of the thermosetting resin remains, and the conductive metal powder is sintered to form a unified sintered metal body.

Method for manufacturing ceramic electronic chip component

A multilayer ceramic capacitor includes a multilayer body including dielectric layers and internal electrode layers, outer electrode layers on end surfaces of the multilayer body at opposite ends in a longitudinal direction and covering end surface sides of each of principal surfaces of the multilayer body at opposite ends in a laminating direction and end surface sides of each of side surfaces at opposite ends in a width direction and bumps on the end surface sides of one principal surface of the multilayer body such that the outer electrode layers covering the one principal surface are sandwiched between the bumps and the one principal surface. Each bump includes copper covering an area of about 50% or more and about 96% or less in a cross section through widthwise centers of the bumps and extending in the laminating direction and the longitudinal direction.

Multilayer ceramic capacitor and bump-producing paste

A method for manufacturing a chip ceramic electronic component that includes an outer electrode including a glass-free sintered layer including no glass is provided. A glass-free conductive paste including a copper-containing metal powder and a thermosetting resin, and not including glass, is applied to cover a portion of a surface of a ceramic body. Then the ceramic body to which the glass-free conductive paste has been applied is subjected to a heat treatment at a temperature higher than or equal to a temperature about 400° C. higher than the curing temperature of the thermosetting resin. By the heat treatment, the thermosetting resin is thermally decomposed or burned and thus the thermosetting resin does not remain, and the metal powder is sintered to form a unified sintered metal body.

Method for manufacturing chip ceramic electronic component

A method for manufacturing a chip ceramic electronic component that includes an outer electrode including a glass-free sintered layer including no glass. A glass-free conductive paste including a nickel powder, a metal powder, such as tin, having a melting point of lower than about 500° C., and a thermosetting resin, and not including glass, is applied to cover a portion of a surface of a ceramic body. The ceramic body to which the glass-free conductive paste has been applied is subjected to a heat treatment at a temperature higher than or equal to a temperature about 400° C. higher than the curing temperature of the thermosetting resin. The thermosetting resin is thermally decomposed or burned such that little or none remains, and the nickel powder and metal powder having a melting point of lower than about 500° C. are sintered to form a unified sintered metal body.

Chip ceramic electronic component and method for manufacturing the same

A conductive paste includes a conductive metal powder and a curable resin. The conductive metal powder includes Ag, Cu, and Ni. In the conductive metal powder, a mass ratio of Ag is about 3.0 wt % or more and about 10.0 wt % or less, a mass ratio of Cu is about {(1&#x2212;mass ratio of Ag/100)&#xd7;70} wt % or more and about {(1&#x2212;mass ratio of Ag/100)&#xd7;95} wt % or less, and a mass ratio of Ni is about {(1&#x2212;mass ratio of Ag/100)&#xd7;5} wt % or more and about {(1&#x2212;mass ratio of Ag/100)&#xd7;30} wt % or less.

Conductive paste and ceramic electronic component

A multilayer ceramic capacitor includes a ceramic base body including ceramic layers and internal electrode layers, which are stacked on each other, and a pair of external electrodes provided on the end surfaces of the ceramic base body and electrically connected to the internal electrode layers. Each of the external electrodes includes an underlying electrode layer and a resin external electrode layer stacked on the underlying electrode layer. The resin external electrode layer includes a thermosetting resin, a metal powder, and an alkyl-based silane coupling agent.

Multilayer ceramic electronic component and electrically conductive paste for resin electrode

A multilayer ceramic electronic component includes a multilayer body including a plurality of stacked ceramic layers and a plurality of stacked inner electrode layers, and outer electrodes on end surfaces of the multilayer body. The outer electrodes include underlying electrode layers on the end surfaces, conductive resin layers that cover the underlying electrode layers, and plating layers that cover the conductive resin layers. The underlying electrode layers are joined to the plating layers in connecting portions without the conductive resin layers interposed between the underlying electrode layers and the plating layers.

Multilayer ceramic electronic component and method for producing the same

A multilayer ceramic electronic component includes a ceramic element assembly and outer electrodes provided on respective end surfaces of the ceramic element assembly. Each outer electrode includes an underlying electrode layer that is provided on the ceramic element assembly and that includes a sintered metal and glass and a conductive resin layer that is provided on the underlying electrode layer and that includes a metal filler and a resin. The underlying electrode layer satisfies at least one condition of a condition that a maximum exposure length of the glass exposed at the interface between the underlying electrode layer and the conductive resin layer is about 3.8 &#x3bc;m or less and a condition that an exposure rate of the glass exposed at the interface between the underlying electrode layer and the conductive resin layer is about 10.1% or less.

Multilayer ceramic electronic component

A ceramic electronic component includes a ceramic body, an inner electrode, an outer electrode, and a connecting portion. The inner electrode is disposed inside the ceramic body. The end portion of the inner electrode extends to a surface of the ceramic body. The outer electrode is disposed on the surface of the ceramic body so as to cover the end portion of the inner electrode. The outer electrode includes a resin and a metal. The connecting portion is disposed so as to extend from an inside of the outer electrode to an inside of the ceramic body. In a portion of the surface of the ceramic body on which the outer electrode is disposed, the length of the connecting portion that extends in a direction in which the inner electrode is extends about 2.4 &#x3bc;m or more.

Method for producing a ceramic electronic component

A conductive resin paste that includes a conductive component and a resin component, where the conductive component includes at least Ag and Cu, and the proportion of the Ag to the total amount of the Ag and Cu included in the conductive component falls within the range of 11.6 mass % to 28.8 mass %. As the conductive component, an Ag-coated Cu powder is used which has a Cu powder with a surface at least partially coated with Ag.

Conductive resin paste and ceramic electronic component

A ceramic electronic component includes a rectangular or substantially rectangular parallelepiped-shaped stack in which a ceramic layer and an internal electrode are alternately stacked and an external electrode provided on a portion of a surface of the stack and electrically connected to the internal electrode. The external electrode includes an inner external electrode covering a portion of the surface of the stack and including a mixture of a resin component and a metal component and an outer external electrode covering the inner external electrode and including a metal component. A volume occupied by the resin component in the inner external electrode is within a prescribed range.

Method of manufacturing a ceramic electronic component

An electronic component body includes an internal electrode that is partially extended to a surface of the electronic component body and is connected to an external electrode including a conductive material-containing resin layer including a conductive material and a resin layer and a plated layer covering the conductive material-containing resin layer. The conductive material-containing resin layer includes metal particles as the conductive material, and the plated layer extends from the surface of the conductive material-containing resin layer into the conductive material-containing resin layer such that the plated layer coats at least some of the metal particles.

Electronic component with an external electrode including a conductive material-containing resin layer

In a multilayer ceramic capacitor, outer electrodes include base electrode layers including a conductive metal and a glass component on a ceramic multilayer body, conductive resin layers including a thermosetting resin and a metal component on the base electrode layers such that exposed portions of the base electrode layers are exposed at least at one corner on one end surface side of the ceramic multilayer body and at least at one corner on the other end surface side thereof, and plating layers on the conductive resin layers and the exposed portions of the base electrode layers. The exposed portions of the base electrode layers are in direct contact with the plating layers at least at one corner on the one end surface side of the ceramic multilayer body and at least at one corner on the other end surface side thereof.

Multilayer ceramic capacitor

A multilayer ceramic electronic component includes a ceramic element body including internal electrodes and external electrodes electrically connected to respective internal electrodes. Each of the external electrodes includes a sintered metal layer including glass and metal and a conductive resin layer including resin and metal particles. In a cross section of the multilayer ceramic capacitor, at an interface between the sintered metal layer and the conductive resin layer, recesses having a shape in which a dimension of an inner portion is larger than a dimension of an inlet are present, and L1/L2 is about 0.2 or more and about 1.5 or less, where L1 is a length along the interface at which the glass of the sintered metal layer is exposed at the interface, and L2 is a length along the interface at which the metal of the sintered metal layer is exposed at the interface.

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Nagaokakyo, Japan

Kota Zenzai