Murata Manufacturing Co., Ltd.

Shota Kitano

Hiroaki Sugita

Takanobu Katsuyama

Mayumi Yamada

Hirobumi Adachi

A body of a multilayer ceramic capacitor includes an inner layer portion and first and second outer layer portions sandwiching the inner layer portion therebetween. The inner layer portion includes an area extending from a conductive layer positioned closest to a first main surface to a conductive layer positioned closest to a second main surface in the stacking direction. The height of the body is smaller than the width of the body. The height of the inner layer portion is smaller than the width of the inner layer portion. The first outer layer portion includes a dielectric layer positioned closest to the first main surface. The second outer layer portion includes a dielectric layer positioned closest to the second main surface, and is thicker than the first outer layer portion. The total height of the first and second outer layer portions is smaller than the height of the inner layer portion.

Multilayer ceramic capacitor, multilayer ceramic capacitor series including the same, and multilayer ceramic capacitor mount body including the same

A multilayer ceramic capacitor includes a body and at least two outer electrodes. The body includes first and second main surfaces, an inner layer portion and first and second outer layer portions. In the inner layer portion, dielectric layers and conductive layers are alternately stacked on each other. The second outer layer portion includes an outer portion and an inner portion. A boundary region adjacent to the inner portion in the outer portion inclines toward the first main surface.

Multilayer ceramic capacitor

A multilayer ceramic capacitor includes a multilayer unit, thickness-direction first and second outer layer sections, and length-direction first and second outer layer sections. A dimension of the thickness-direction second outer layer section is greater than a dimension of the thickness-direction first outer layer section. The thickness-direction second outer layer section includes an inner portion and an outer portion. A composition ratio of Si to Ti in a ceramic dielectric layer included in the outer portion is higher than that in the inner portion. A Si content ratio is higher in a boundary portion between the outer portion and the inner portion. The inner portion has a higher composition ratio of Mn to Ti than the outer portion. Both of minimum dimensions in the length direction of the length-direction first and second outer layer sections are greater than a dimension in the thickness direction of the thickness-direction first outer layer section.

A multilayer ceramic capacitor includes a multilayer unit, thickness-direction first and second outer layer sections, length-direction first and second outer layer sections, and width-direction first and second outer layer sections. A dimension of the thickness-direction second outer layer section is greater than a dimension of the thickness-direction first outer layer section. The thickness-direction second outer layer section includes an inner portion and an outer portion. A composition ratio of Si to Ti in a ceramic dielectric layer included in the outer portion is higher than that in the inner portion. A boundary portion between the outer portion and the inner portion has a larger Si content than the outer portion. The inner portion has a higher composition ratio of Mn to Ti than the outer portion. Each of minimum dimensions in the length direction of the length-direction first and second outer layer sections is greater than both dimensions in the width direction of the width-direction first and second outer layer sections.

A multilayer body includes an inner layer portion having a dimension in a stacking direction greater than a dimension of the inner layer portion in a width direction, a second outer layer portion including an outer portion including a second principle surface and an inner portion disposed adjacent to both of the outer portion and the inner layer portion, a dimension of the outer portion in the stacking direction being greater than a dimension of the inner portion, and a composition ratio of Si relative to Ti in the outer portion is greater than that in the inner portion.

A multilayer ceramic capacitor includes a multilayer unit, thickness-direction first and second outer layer sections, and width-direction first and second outer layer sections. A dimension of the thickness-direction second outer layer section is greater than a dimension of the thickness-direction first outer layer section. The thickness-direction second outer layer section includes an inner portion and an outer portion. A composition ratio of Si to Ti in a ceramic dielectric layer included in the outer portion is higher than that in the inner portion. A Si content ratio is higher in a boundary portion between the outer portion and the inner portion. A relationship expressed by T/(W&#x2212;W)&#x2266;6.95 is satisfied when a minimum dimension in the width direction of the body is denoted by W, a minimum dimension in the thickness direction of the multilayer unit is denoted by T, and a minimum dimension in the width direction of the multilayer unit is denoted by W

A multilayer ceramic capacitor includes a multilayer unit, thickness-direction first and second outer layer sections, and length-direction first and second outer layer sections. A dimension of the thickness-direction second outer layer section is greater than a dimension of the thickness-direction first outer layer section. The thickness-direction second outer layer section includes an inner portion and an outer portion. A composition ratio of Si to Ti in a ceramic dielectric layer included in the outer portion is higher than that in the inner portion. A Si content ratio is higher in a boundary portion between the outer portion and the inner portion. A relationship expressed by T/(L&#x2212;L)&#x2266;5.98 is satisfied when a minimum dimension in the length direction of the body is denoted by L, a minimum dimension in the thickness direction of the multilayer unit is denoted by T, and a minimum dimension in the length direction of the multilayer unit is denoted by L

Growing community of inventors

Nagaokakyo, Japan

Shota Kitano