Taiyo Yuden Co., Ltd.

Kunihiko Nagaoka

Noriyuki Chigira

Koichiro Morita

Chie Kawamura

Tomoaki Nakamura

Minoru Ryu

Tetsuo Shimura

Kazumichi Hiroi

A multilayer ceramic capacitor includes: a ceramic multilayer structure having a structure in which each of a plurality of ceramic dielectric layers and each of a plurality of internal electrode layers are alternately stacked and are alternately exposed to two edge faces of the ceramic multilayer structure; and a pair of external electrodes that are formed on the two edge faces, wherein when an average value of insulation resistances of each pair of the internal electrode adjacent to each other in a stacking direction is IRand a minimum value of the insulation resistances is IR, (IR&#x2212;IR)/IR&#x3c;0.50 is satisfied.

Multilayer ceramic capacitor having certain interlayer insulation resistance

A multilayer ceramic capacitor includes: a multilayer structure in which each of a plurality of ceramic dielectric layers and each of a plurality of internal electrodes are alternately stacked and are alternately exposed to two edge faces of the multilayer structure; a first external electrode that is coupled to one of the two edge faces; and a second external electrode that is coupled to the other of the two edge faces, wherein: a main component of the plurality of ceramic dielectric layers is BaTiO; the plurality of ceramic dielectric layers include a rare earth element; and an atomic concentration ratio of a total amount of Mn and V with respect to Ti in the plurality of ceramic dielectric layers is 0.035% or more and 0.120% or less.

Multilayer ceramic capacitor

A multilayer ceramic capacitor includes: a first and a second external electrodes; internal electrode layers that are alternately connected to the first and the second external electrodes; and dielectric layers including a ceramic material as a main component, wherein a D20% diameter of the ceramic material of an end margin region, in which internal electrode layers connected to one of the first external electrode and the second external electrode face with each other and does not face with internal electrode layers connected to the other, is smaller than that of a capacity region in which internal electrode layers connected to different external electrodes face with each other and a D80% diameter of the ceramic material of the end margin region is larger than that of the capacity region, or 1/(log D80&#x2212;log D20) of the ceramic material of the capacity region is larger than that of the end margin region.

Multilayer ceramic capacitor and manufacturing method of multilayer ceramic capacitor

Dielectric layers are prepared using a dielectric material that contains a ceramic powder having Ba, Ti, and additive element X which is solid-solubilized and is at least one element selected from the group consisting of Mo, Ta, Nb, and W, wherein the standard deviation of the ratio of the peak intensity of the additive element X (XK&#x3b1;) measured by STEM-EDX, and the sum of the peak intensity of the Ti and peak intensity of the Ba (BaL&#x3b1;+TiK&#x3b1;) measured by STEM-EDX, is less than 10.5% of the average ratio as measured at a total of five points including the three points that divide the maximum diameter of one grain of the ceramic powder into four equal parts, and two excluding the center point of the three points that divide the diameter crossing at right angles with the maximum diameter at its center point, into four equal parts.

Dielectric material for multilayer ceramic capacitor, and multilayer ceramic capacitor

A multi-layer ceramic capacitor has a structure where its dielectric layers are constituted by a sintered compact that contains a mol of ReO, b mol of SiO, c mol of MO, d mol of ZrO, and e mol of MgO (where Re is a rare earth element, M is a metal element (except for Ba, Ti, Re, Si, Zr, Mg, and rare earth elements), and x is a valance) per 100 mol of BaTiO, and a, b, c, d, and e mentioned above which indicate the mol numbers of respective constituents per 100 mol of BaTiOare 0.1&#x2266;a&#x2266;1.0, 0.1&#x2266;b&#x2266;1.5, 0.1&#x2266;c&#x2266;0.4, 0&#x2266;d&#x2266;1.0, and 0&#x2266;e&#x2266;0.03, respectively.

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Takasaki, Japan

Kunihiko Nagaoka