Laminated capacitor

Patent metadata

Field	Value
Publication number	US-9984826-B2
Application number	US-201615275631-A
Country	US
Kind code	B2
Filing date	Sep 26, 2016
Priority date	Sep 30, 2015
Publication date	May 29, 2018
Grant date	May 29, 2018

Abstract

A laminated capacitor includes a multilayer body and first and second outer electrodes on a portion of a surface of the multilayer body. Relationships GT1>GL>GW, GT2>GL>GW, SL>SW, and (SL/SW)>(ML/MW) are satisfied, where a thickness of a first outer layer portion is GT1, a thickness of a second outer layer portion is GT2, a width of a side portion is GW, each length of end portions is GL, a length of the multilayer body is SL, a width of the multilayer body is SW, a length of a main portion is ML, and a width of the main portion is MW.

First claim

What is claimed is:

1. A laminated capacitor comprising:
a multilayer body with a rectangular or substantially rectangular parallelepiped shape and including a plurality of dielectric layers and a plurality of conductor layers laminated in a lamination direction, a first main surface and a second main surface opposing each other in the lamination direction, side surfaces connecting the first main surface and the second main surface and being perpendicular or substantially perpendicular to a width direction, and end surfaces connecting the first main surface and the second main surface and being perpendicular or substantially perpendicular to a lengthwise direction; and
a first outer electrode and a second outer electrode provided on a portion of a surface of the multilayer body; wherein
the plurality of conductor layers include a first conductor layer connected to the first outer electrode and a second conductor layer connected to the second outer electrode;
the multilayer body includes:
a main portion in which opposing portions of the first conductor layer and the second conductor layer are laminated;
a first outer layer portion between the first main surface and the main portion;
a second outer layer portion between the second main surface and the main portion;
a side portion between the side surface and the main portion; and
an end portion between the end surface and the main portion; and

relationships GT1>GL>GW, GT2>GL>GW, SL>SW, and (SL/SW)>(ML/MW) are satisfied, where a thickness of the first outer layer portion is GT1, a thickness of the second outer layer portion is GT2, a width of the side portion is GW, a length of the end portion is GL, a length of the multilayer body is SL, a width of the multilayer body is SW, a length of the main portion is ML, and a width of the main portion is MW.

2. The laminated capacitor according to claim 1 , wherein a relationship of 2>(SL/SW)>(ML/MW)>1.5 is satisfied.

3. The laminated capacitor according to claim 1 , wherein
the second outer layer portion includes an inner side portion layer adjacent to the main portion, and an outer side portion layer that is adjacent to the inner side portion layer and defines the second main surface; and
a material composition of the outer side portion layer is different from a material composition of the inner side portion layer.

4. The laminated capacitor according to claim 1 , wherein
at least each of the first and second outer electrodes includes a base portion directly covering a surface of the multilayer body, and a cover portion which covers the base portion;
the base portion is made of a material including a ceramic component and a Ni component;
the cover portion is made of a plating film; and
each of the plurality of conductor layers is made of a material containing a Ni component.

5. The laminated capacitor according to claim 4 , wherein the Ni component of each of the plurality of conductor layers and the Ni component of the base portion are integrated with each other in a connecting portion between each of the plurality of conductor layers and the base portion.

6. The laminated capacitor according to claim 1 , wherein a distance between two ends of the plurality of conductor layers that are farthest from each other in the width direction is shorter than a distance between two ends of the plurality of conductor layers that are farthest from each other in the lengthwise direction.

7. The laminated capacitor according to claim 1 , wherein
the side surfaces include a first side surface and a second side surface that oppose each other in the width direction;
the end surfaces include a first end surface and a second end surface that oppose each other in the lengthwise direction;
the side portions include a first side portion between the first side surface and the main portion, and a second side portion between the second side surface and the main portion;
the end portions include a first end portion between the first end surface and the main portion, and a second end portion between the second end surface and the main portion;
the width GW is a width of the first side portion or a width of the second side portion; and
the length GL is a length of the first end portion or a length of the second end portion.

8. A laminated capacitor comprising:
a multilayer body with a rectangular or substantially rectangular parallelepiped shape and including a plurality of dielectric layers and a plurality of conductor layers laminated in a lamination direction, a first main surface and a second main surface that oppose each other in a lamination direction, side surfaces connecting the first main surface and the second main surface and being perpendicular or substantially perpendicular to a width direction, and end surfaces connecting the first main surface and the second main surface and being perpendicular or substantially perpendicular to a lengthwise direction; and
a first outer electrode and a second outer electrode provided on a portion of a surface of the multilayer body; wherein
the plurality of conductor layers include a first conductor layer connected to the first outer electrode and a second conductor layer connected to the second outer electrode;
the multilayer body includes:
a main portion in which opposing portions of the first conductor layer and the second conductor layer are laminated;
a first outer layer portion between the first main surface and the main portion;
a second outer layer portion between the second main surface and the main portion;
a side portion between the side surface and the main portion; and
an end portion between the end surface and the main portion; and

relationships GT2>GT1, GT2>GL>GW, SL>SW, and (SL/SW)>(ML/MW) are satisfied, where a thickness of the first outer layer portion is GT1, a thickness of the second outer layer portion is GT2, a width of the side portion is GW, a length of the end portion is GL, a length of the multilayer body is SL, a width of the multilayer body is SW, a length of the main portion is ML, and a width of the main portion is MW.

9. The laminated capacitor according to claim 8 , wherein a relationship of 2>(SL/SW)>(ML/MW)>1.5 is satisfied.

10. The laminated capacitor according to claim 8 , wherein
the second outer layer portion includes an inner side portion layer adjacent to the main portion, and an outer side portion layer that is adjacent to the inner side portion layer and defines the second main surface; and
a material composition of the outer side portion layer is different from a material composition of the inner side portion layer.

11. The laminated capacitor according to claim 8 , wherein
at least each of the first and second outer electrodes includes a base portion directly covering a surface of the multilayer body, and a cover portion which covers the base portion;
the base portion is made of a material including a ceramic component and a Ni component;
the cover portion is made of a plating film; and
each of the plurality of conductor layers is made of a material containing a Ni component.

12. The laminated capacitor according to claim 11 , wherein the Ni component of each of the plurality of conductor layers and the Ni component of the base portion are integrated with each other in a connecting portion between each of the plurality of conductor layers and the base portion.

13. The laminated capacitor according to claim 8 , wherein a distance between two ends of the plurality of conductor layers that are farthest from each other in the width direction is shorter than a distance between two ends of the plurality of conductor layers that are farthest from each other i

Assignees

• Murata Manufacturing Co

Inventors

• Morito Kaori
• Katsuyama Takanobu

Classifications

• H01G4/224

  Housing; Encapsulation · CPC title

• H01G4/018

  Dielectrics · CPC title

• H01G4/005

  Electrodes · CPC title

• H01G4/228

  Terminals · CPC title

• H01G4/30 Primary

  Stacked capacitors (H01G4/33 takes precedence) · CPC title