Taiyo Yuden Co., Ltd.

Japan Atomic Energy Research Institute

Nitto Boseki Co., Ltd.

The Furukawa Electric Co., Ltd.

Yuasa Battery Co., Ltd.

Takashi Sasaki

Kunio Araki

Miyuki Hagiwara

Yoshiaki Iijima

So Sato

Fumio Hosoi

Tomohiko Zaima

Kunihiro Matsushita

Kazuo Goto

Hayao Ishitani

Kiyoshi Tabei

Eisuke Saito

Isao Ishigaki

Tomohiko Noda

Tohru Takagi

Kazunari Takeda

Noboru Kasai

Shyuiti Izuti

Toshiya Kuji

Fukio Kinoshita

Shota Yajima

Shin Nakayasu

Hiromi Sunaga

Shigenori Egusa

Kiyoshi Nanishi

Yoshisada Yamashita

Keiichi Yotumoto

Kunio Tajiri

Hirokama Kittaka

Yuko Kasahara

Kyoji Komatsu

Kazuo Gotoh

Kyozi Komatsu

Takayuki Hirano

A multi-layer ceramic electronic component includes a ceramic body and an external electrode. The ceramic body includes an end surface facing in a first direction, and internal electrodes exposed from the end surface and laminated in a second direction orthogonal to the first direction. The external electrode is provided on the end surface and includes two protrusions that are formed along two peripheral portions of the end surface and protrude in the first direction, the two peripheral portions being disposed in a third direction orthogonal to the first direction and the second direction.

Multi-layer ceramic electronic component, circuit board, and method of producing a multi-layer ceramic electronic component

A ceramic electronic device includes: a multilayer chip in which dielectric layers are stacked, the multilayer chip having two end faces, an upper face, a lower face and two side faces; a plurality of internal electrode layers that are provided inside of the multilayer chip; and a pair of external electrodes that are provided on the two end faces and are connected to the plurality of internal electrode layers, wherein each of the pair of external electrodes has a smaller thickness in a region not connected to the plurality of internal electrode layers, has an inwardly inflected point as viewed toward the plurality of internal electrode layers, and has a larger thickness in a region connected to the plurality of internal electrode layers, as measured in a direction perpendicular to the corresponding end face.

Ceramic electronic device with inflected external electrodes

A multi-layer ceramic electronic component includes: a ceramic body including first and second internal electrodes laminated in a first axis direction, first and second main surfaces facing in the first axis direction, and first and second end surfaces facing in a second axis direction orthogonal to the first axis, the first and second internal electrodes being drawn to those end surfaces; a first external electrode covering the first end surface and extending to the first main surface; and a second external electrode covering the second end surface and extending to the first main surface. Each external electrode includes a first region including a first outermost layer mainly containing tin and extending from the end surface to the first main surface, and a second region free from an outermost layer mainly containing tin and disposed adjacent to the first region in the first axis direction on the end surface.

Multi-layer ceramic electronic component and circuit board

In an exemplary embodiment, in a multilayer ceramic capacitora first insulative layer-having parts AAcovered by the first partof each external electrodeis provided on one third-direction face, while a second insulative layer-having parts AAcovered by the second partof each external electrodeis provided on the other third-direction face, of the capacitor bodyof the multilayer ceramic capacitorThe multilayer ceramic electronic component can prevent moisture intrusion into the component body as much as possible, even when the multilayer ceramic electronic component is made thin.

Multilayer ceramic electronic component

A ceramic electronic device includes: a multilayer chip in which dielectric layers are stacked, the multilayer chip having two end faces, an upper face, a lower face and two side faces; a plurality of first internal electrode layers that are provided inside of the multilayer chip, each of the plurality of first internal electrode layers having projection portions extracted to the two side faces; and external electrodes that are provided on the two side faces between the two end faces and are connected to the projection portions, wherein each of the external electrodes has a smaller thickness in a region not connected to the projection portions, has an inflection point toward the projection portions, and has a larger thickness in a region connected to the projection portions, in a direction connecting the two end faces.

Ceramic electronic device with inflected external electrodes and manufacturing method of ceramic electronic device with reverse pattern slurry

In an embodiment, a multilayer ceramic capacitorhas supplementary dielectric layers, each having a first cover partthat covers the space between two first base conductor filmson each of both height-direction faces, and second cover partsthat connect to the first cover partand also cover parts of the first base conductor films, respectively, in the length direction. External electrodeseach have a second base conductor filmattached to a one length-direction face and to one length-direction edges of two first base conductor filmson the respective height-direction faces, and a surface conductor filmattached continuously to the surface of the second base conductor filmand also to the parts of the surfaces of the two first base conductor filmsnot covered by the second cover parts

Multilayer ceramic capacitor

In an embodiment, a multilayer ceramic capacitorincludes: a first external electrodehaving a first partprovided on one height-direction face, and a second partprovided on the other height-direction face, of the capacitor body; and a second external electrodehaving a first partprovided on one height-direction face, and a second partprovided on the other height-direction face, of the capacitor body. In addition, the reference length Lof the first part, and the reference length Lof the second part, of the first external electrodesatisfy the relational expression 'L&#x3e;L,' while the reference length Lof the first part, and the reference length Lof the second part, of the second external electrodesatisfy the relational expression 'L&#x3c;L

In an exemplary embodiment, each of external electrodesof a multilayer ceramic capacitorcontinuously has a first planar partpresent on each end face of a capacitor bodyin a first direction d, a second planar partpresent on one end face of the capacitor bodyin a third direction d, and auxiliary planar partspresent on both end faces of the capacitor bodyin a second direction d. A maximum third-direction dimension D] of each of the auxiliary planar partsis smaller than a third-direction dimension D] of the first planar part, while a first-direction dimension D] of each of the auxiliary planar partsis smaller than a first-direction dimension D] of the second planar part

In an embodiment, in a multilayer ceramic capacitor, a first insulative layer-having parts A, Acovered by the first partof each external electrodeis provided on one third-direction face, while a second insulative layer-having parts A, Acovered by the second partof each external electrodeis provided on the other third-direction face, of the capacitor bodyof the multilayer ceramic capacitor. The multilayer ceramic electronic component can prevent moisture intrusion into the component body as much as possible, even when the multilayer ceramic electronic component is made thin.

In an embodiment, a multilayer ceramic capacitorhas supplementary dielectric layerscovering the spaces between two first base conductor filmson both height-direction faces of a capacitive element', respectively, in such a way that clearances CL are left between the first base conductor filmsand the supplementary dielectric layersin the length direction. External electrodeseach have a second base conductor filmand a surface conductor film, and the wraparound locationsof each surface conductor filmhave insertion partsthat fill in the clearances CL. The multilayer ceramic capacitor can mitigate deterioration in moisture resistance.

In an embodiment, a multilayer ceramic capacitoris such that: the two first base conductor films, and the supplementary dielectric layer, on each of both height-direction faces of the capacitive element', are connected to each other based on mutual bonding of the dielectric particles contained in each of them; the two first base conductor filmson each of both height-direction faces of the capacitive element&#x2032;, and the capacitive element&#x2032;, are connected to each other based on mutual bonding of the dielectric particles contained in each of them; and the supplementary dielectric layeron each of both height-direction faces of the capacitive element&#x2032;, are the capacitive element&#x2032;, are connected to each other based on mutual bonding of the dielectric particles contained in each of them.

In an embodiment of a multilayer electronic component, one main electrode partof the first external electrodepresent on one height-direction face of the capacitor bodyof the multilayer capacitor is partially opposed to the other main electrode partof the second external electrodepresent on the other height-direction face, while one main electrode partof the second external electrodepresent on one height-direction face of the capacitor bodyis partially opposed to the other main electrode partof the first external electrodepresent on the other height-direction face of the capacitor body, and margin areas MRto MRof roughly belt shape exist between each of the opposing areas OR and each of the edges on both height-direction faces of the capacitor body

Multilayer electronic component

In an embodiment, a multilayer ceramic capacitorhas a first external electrodehaving a second part, and a second external electrodehaving a second part, and each second part have an external shape where length Lbecomes the largest at a width-direction center portionorand length Lbecomes the smallest at a width-direction edgeor, with the length decreasing gradually from the width-direction center portionorto the width-direction edgeor

In an embodiment, a through-type multilayer ceramic capacitor-has a first external electrodeprovided on one end of the capacitor bodyin the length direction, and a second external electrodeprovided on the other end of the capacitor bodyin the length direction, and it also has a third external electrodeof quadrangular cylinder shape provided at the center of the capacitor bodyin a manner continuously covering parts of both sides in the height direction, and parts of both sides in the width direction, of the capacitor body, in a state not contacting the first external electrodeand second external electrode. The through-type multilayer ceramic capacitor can offer improved strength at the time of installation on a circuit board.

Through-type multilayer ceramic capacitor

The improved battery for reversible operation at ambient temperature comprises a negative electrode, a composite positive electrode which is composed of an ion-conductive high-molecular weight compound that has at least one ionic compound dissolved therein and that has a polyether structure and ion conductivity, an electrochemically active material and, optionally, an electron conductive material, and an electrolyte which is made of an ion-conductive high-molecular weight compound that has at least one ionic compound dissolved therein and that has a polyether structure and ion conductivity. The improvement is such that said composite positive electrode and said electrolyte are formed by exposure to an active radiation such as ultraviolet rays or ionizing radiation. Thanks to the improvement in electrolyte and positive electrode, the battery can be fabricated with great ease, is entirely free from the possibility of electrolyte leakage and has high long-term reliability and safety.

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Takasaki, Japan

Takashi Sasaki