Taiyo Yuden Co., Ltd.

Yusuke Kowase

Kotaro Mizuno

Yukihiro Konishi

Shohei Kitamura

Yoichi Kato

Toru Makino

Yoshinori Tanaka

Kazumichi Hiroi

Ayumu Sato

Jun Nishikawa

Katsuya Taniguchi

Yuichi Kasuya

Takehiro Tanaka

A multilayer ceramic capacitor includes an element body and a pair of external electrodes. The element body includes a laminate. The laminate has a plurality of inner electrode layers stacked via dielectric layers. A height of the laminate in a stacking direction of the inner electrode layers is greater than a width of each of the inner electrode layers. The two external electrodes are formed on the element body such that one of the two external electrodes is connected to every other ones of the inner electrode layers and the other external electrode is connected to the remaining every other ones of the inner electrode layers.

Multilayer ceramic capacitor, a method of manufacturing the same and a substrate arrangement

A multi-layer ceramic electronic component includes a multi-layer unit and a side margin. The multi-layer unit includes a functional unit including internal electrodes laminated in a first direction, and a pair of covers that covers the functional unit from both sides in the first direction, the multi-layer unit satisfying a relationship of (2*t2)/t1&#x2265;0.6, where t1 represents a dimension of the functional unit in the first direction and t2 represents a dimension of each of the pair of covers in the first direction. The side margin covers the multi-layer unit in a second direction orthogonal to the first direction.

Multi-layer ceramic electronic component and method of producing the same

A ceramic electronic component includes a multilayer chip having a rectangular parallelepiped shape and including dielectric layers and internal electrode layers alternately stacked, the dielectric layers being mainly composed of ceramic, the internal electrode layers being alternately exposed to two edge faces of the multilayer chip opposite to each other, and external electrodes respectively formed on the two edge faces, wherein an average crystal grain size of the ceramic in a cross section is 200 nm or less in a dielectric portion, and a CV value of a grain size distribution of crystal grains of the ceramic in the cross section is less than 38% in the dielectric portion, the dielectric portion being defined as a region made of the ceramic in the multilayer chip that is in contact with one of the external electrodes and that has a width of 5 &#x3bc;m from said one of the external electrodes.

Ceramic electronic component and method of manufacturing the same

A ceramic electronic device includes: a multilayer chip having a structure in which each of dielectric layers and each of internal electrode layers are alternately stacked; and external electrodes provided on end faces of the multilayer chip, wherein a main component of the external electrodes is a first metal, wherein the internal electrode layers include the first metal and a second metal of which a melting point is higher than that of the first metal, wherein a diffusion coefficient of the first metal with respect to the second metal is larger than that of the second metal with respect to the first metal, wherein a number of a cavity in a range of 10 numbers of the internal electrode layers that are next to each other and are connected to a same external electrode of the first external electrode and the second external electrode is 1 or less.

Ceramic electronic device, circuit substrate and manufacturing method of ceramic electronic device

A multilayer ceramic capacitor includes an element body of roughly rectangular solid shape which is constituted by dielectric layers alternately stacked with internal electrode layers having different polarities, with a pair of cover layers formed on it to cover the top and bottom faces in the direction of lamination of the foregoing, and which has a pair of principal faces, a pair of end faces, and a pair of side faces, wherein external electrodes are formed on the pair of end faces and at least one of the pair of principal faces of the element body, and Tt representing the thickness of the external electrode and Tc representing the thickness of the cover layer satisfy the relationship of 1/30&#x2264;Tt/Tc&#x2264;4/5, and the thickness of the cover layers, or Tc, is 10 &#x3bc;m or more but 30 &#x3bc;m or less.

Multilayer ceramic capacitor having certain thickness ratio of external electrode to cover layer

A multi-layer ceramic electronic component includes a plurality of layered internal electrodes and a first crystal grain. The plurality of layered internal electrodes are disposed at intervals in a first direction and each include a pore. The first crystal grain has a larger diameter in the first direction than the interval and has a part disposed in the pore.

Multi-layer ceramic electronic component

A multi-layer ceramic electronic component includes a multi-layer unit and a side margin. The multi-layer unit includes ceramic layers laminated in a direction of a first axis, internal electrodes positioned between the ceramic layers, and a side surface facing in a direction of a second axis orthogonal to the first axis, the internal electrodes being exposed from the side surface, the multi-layer unit having a first dimension of 0.5 mm or less along a direction of a third axis orthogonal to the first axis and the second axis, the side surface having an area of 0.1 mmor more. The side margin covers the side surface of the multi-layer unit.

A method for manufacturing a multilayer ceramic capacitor includes: producing a plurality of dielectric green sheets; producing therefrom a plurality of internal electrode-printed green sheets; producing therefrom a plurality of individually cut unsintered laminates by stacking some of the plurality of dielectric green sheets, as cover layers, and the plurality of internal electrode-printed green sheets together; producing therefrom element body precursors by applying a ceramic paste to side faces of the unsintered laminates for forming side margins thereon, wherein an application thickness of the ceramic paste is adjusted in a manner such that a thickness of the side margins is greater than a thickness of the cover layers in the final product; producing therefrom element bodies by sintering; and forming external electrodes on at least one of principal faces and on both end faces of the element bodies.

Method for manufacturing multilayer ceramic capacitor

A multilayer ceramic capacitor includes an element body of roughly rectangular solid shape which is constituted by dielectric layers alternately stacked with internal electrode layers having different polarities and which has a pair of principle faces, a pair of end faces, and a pair of side faces, wherein the multilayer ceramic capacitor is such that: external electrodes are formed on the pair of end faces and one principle face of the element body; and on a cross section taken in parallel with one end face of the multilayer ceramic capacitor near the end face, the ratio of area A constituted by the internal electrode layers connected to the external electrode on this end face side and the dielectric layers present between the internal electrode layers, and area B covering the part of the section excluding the external electrodes, A/B, is 0.92 or more.

Multilayer ceramic capacitor having a tuned effective volume

In an exemplary embodiment, a multilayer ceramic capacitoris formed in such a way that a first face fof a capacitor bodyhas a concave shape and a first partof a first external electrodecontacts the concave-shaped first face f, and that a second face fof the capacitor bodyhas a concave shape and a first partof a second external electrodecontacts the concave-shaped second face f

Multilayer ceramic capacitor

A multi-layer ceramic capacitor includes a multi-layer unit and a side margin. The multi-layer unit includes ceramic layers laminated in a first direction, internal electrodes disposed between the ceramic layers, and a side surface from which the internal electrodes are exposed, the side surface being oriented in a second direction orthogonal to the first direction. The side margin covers the side surface. The side margin includes a first area having a porosity of 10% or less, a dimension of the first area in the second direction from the side surface being &#xbc; of a dimension of the side margin in the second direction, and a second area having a porosity of 10% or more and 25% or less and having a porosity higher than the porosity of the first area, the second area covering the first area from the second direction.

Multi-layer ceramic capacitor and method of producing the same

In an embodiment, a multilayer ceramic capacitoris formed in such a way that a first face fof a capacitor bodyhas a concave shape and a first partof a first external electrodecontacts the concave-shaped first face f, and that a second face fof the capacitor bodyhas a concave shape and a first partof a second external electrodecontacts the concave-shaped second face f

In an embodiment, a multilayer ceramic capacitorhas the first external electrodeand second external electrodeprovided with a space between them on the other height-direction surface fof the capacitor bodyin the length direction, where the width Wa of the other height-direction surface fof the capacitor bodyis smaller than the width W of the one height-direction surface f. The multilayer ceramic capacitor can improve yield and help reduce cost by allowing several of the conditions to be found non-defective in the appearance inspection.

A multilayer ceramic capacitor includes ceramic grains forming a dielectric layer of the multilayer ceramic capacitor, which ceramic grains contain a coarse ceramic grain SPr having a coarse grain size Dcoa that satisfies the condition of Tmin &#x2266;Dcoa &#x2266;Tmax where Tmax is the maximum thickness of the dielectric layer and Tmin is the minimum thickness of the dielectric layer. The multilayer ceramic capacitor is capable of inhibiting deterioration of capacitance and capacity-temperature characteristics even when the internal electrode layer is made thin.

A laminated ceramic electronic component has electrode layers stacked with ceramic layers, where the thickness of each electrode layer is controlled to 0.5 &#x3bc;m or less and the average size of crystal grains constituting the electrode layer is controlled to 0.1 &#x3bc;m or less. The occurrence of structural defects in the laminated ceramic electronic component can be suppressed and high continuity of the electrode layers stacked with the ceramic layers is ensured.

Growing community of inventors

Takasaki, Japan

Yusuke Kowase