Taiyo Yuden Co., Ltd.

Noriyuki Chigira

Kunihiko Nagaoka

Koichiro Morita

Tomoaki Nakamura

Shusaku Ueda

Shinichi Abe

A multilayer ceramic capacitor includes: a multilayer structure in which each of a plurality of dielectric layers and each of a plurality of internal electrode layers are alternately stacked, the plurality of internal electrode layers being alternately exposed to a first edge face and a second edge face of the multilayer structure, wherein: a concentration of Mo with respect to a main component ceramic of an end margin region and a side margin region is lower than a concentration of Mo with respect to a main component ceramic of the dielectric layers in the multilayer structure.

Multilayer ceramic capacitor of barium titanate ceramic doped with molybdenum and manufacturing method thereof

A multilayer ceramic capacitor includes: a multilayer structure in which each of a plurality of dielectric layers and each of a plurality of internal electrode layers are alternately stacked, wherein concentrations of Mn, Si and B of a margin region are respectively higher than concentrations of Mn, Si and B of the dielectric layers, wherein a donor element concentration of the margin region is lower than a donor element concentration of the dielectric layers, wherein the margin region is at least one of an end margin region and a side margin region.

Multilayer ceramic capacitor and manufacturing method of multilayer ceramic capacitor

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 dielectric layers and each of a plurality of internal electrode layers are alternately stacked, the plurality of internal electrode layers being alternately exposed to a first edge face and a second edge face of the multilayer structure; and a cover layer that is provided at least on an upper face and a lower face of the multilayer structure, a main component of the cover layer being a same as that of the dielectric layers, wherein: a concentration of a donor element with respect to a main component ceramic of at least one of the cover layer, an end margin region and a side margin region is lower than a concentration of the donor element with respect to a main component ceramic of the dielectric layers in the multilayer structure.

Multilayer ceramic capacitor and manufacturing method thereof

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 multilayer structure in which each of a plurality of ceramic dielectric layers and each of a plurality of internal electrode layers including a ceramic co-material are alternately stacked, wherein a concentration of Mg in a ceramic grain that is included in the ceramic dielectric layer and contacts to the internal electrode layer is smaller than that in the co-material.

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 electrode layers including a co-material are alternately stacked, wherein a Mo concentration in the co-material is smaller than that in a ceramic grain in the ceramic dielectric layer.

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.

A multilayer ceramic capacitor has multiple laminated dielectric ceramic layers made of a dielectric ceramic, internal electrodes formed between the dielectric ceramic layers, and external electrodes electrically connected to the internal electrodes, wherein generation of cracks in the dielectric layer due to expansion of the internal electrode is suppressed by causing ceramic grains having a crystal axis ratio c/a higher than that of the ceramic grains constituting the dielectric layer to be present in non-contiguous parts of the internal electrodes between the dielectric ceramic layers, and by harnessing the stress-mitigating effect of domain switching involving these ceramic grains.

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Takasaki, Japan

Noriyuki Chigira