Multilayer capacitor and installation structure of multilayer capacitor

Patent metadata

Field	Value
Publication number	US-9773619-B2
Application number	US-201615393346-A
Country	US
Kind code	B2
Filing date	Dec 29, 2016
Priority date	Aug 13, 2014
Publication date	Sep 26, 2017
Grant date	Sep 26, 2017

Abstract

In a multilayer capacitor, a multilayer capacitor main body includes first and second main surfaces, first and second side surfaces, and first and second end surfaces, the first and second main surfaces extending in a length direction and a width direction, the first and second side surfaces extending in the length direction and a thickness direction, and the first and second end surfaces extending in the width direction and the thickness direction. The second main surface is depressed in a portion extending from opposite ends of the second main surface toward a center of the second main surface in the length direction.

First claim

What is claimed is:

1. A multilayer capacitor comprising:
a multilayer capacitor main body which includes first and second main surfaces, first and second side surfaces, and first and second end surfaces, the first and second main surfaces extending in a length direction and a width direction, the first and second side surfaces extending in the length direction and a thickness direction, and the first and second end surfaces extending in the width direction and the thickness direction;
a first inner electrode extending in the length direction and the thickness direction and including a first effective portion, a first extending portion, and a second extending portion, the first extending portion being connected to the first effective portion and extending to the second main surface, and the second extending portion being connected to the first effective portion and extending to the second main surface;
a second inner electrode extending in the length direction and the thickness direction and including a second effective portion and a third extending portion, the second effective portion facing the first effective portion in the width direction, and the third extending portion being connected to the second effective portion, not facing the first inner electrode, and extending to the second main surface;
a first terminal electrode which is connected to an exposed portion of the first extending portion and extends across a portion of the second main surface on a side of the first end surface in the length direction, the first end surface, and the first and second side surfaces;
a second terminal electrode which is connected to an exposed portion of the second extending portion and extends across a portion of the second main surface on a side of the second end surface in the length direction, the second end surface, and the first and second side surfaces; and
a third terminal electrode which is connected to an exposed portion of the third extending portion and extends across a portion of the second main surface between the first terminal electrode and the second terminal electrode in the length direction and the first and second side surfaces; wherein
the first terminal electrode includes a portion which projects towards a center of the multilayer capacitor main body in the length direction;
the second terminal electrode includes a portion which projects towards the center of the multilayer capacitor main body in the length direction;
a distance in the length direction between the first end surface and the first extending portion at a center or approximate center of the second main surface in the width direction is smaller than each distance in the length direction between the first end surface and the first extending portion nearest to the first and second side surfaces; and
a distance in the length direction between the second end surface and the second extending portion at the center or the approximate center of the second main surface in the width direction is smaller than each distance in the length direction between the second end surface and the second extending portion nearest to the first and second side surfaces.

2. The multilayer capacitor according to claim 1 , wherein a dimension of the third terminal electrode on the second main surface in the length direction is greater than a dimension of the first and second terminal electrodes on the second main surface in the length direction.

3. The multilayer capacitor according to claim 1 , wherein
L 1 represents a dimension of the exposed portion of the first extending portion in the length direction;
L 2 represents a dimension of the exposed portion of the second extending portion in the length direction; and
L 3 represents a dimension of the exposed portion of the third extending portion in the length direction; wherein
L3>L1 and
L3>L2

are satisfied.

4. The multilayer capacitor according to claim 1 , wherein the first main surface does not contain any terminal electrodes thereon.

Assignees

• Murata Manufacturing Co

Inventors

• Uno Sui
• Sawada Takashi
• Mukobata Yohei

Classifications

• H01G4/012

  Form of non-self-supporting electrodes · CPC title

• H01G4/30 Primary

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

• H01G4/232

  electrically connecting two or more layers of a stacked or rolled capacitor · CPC title