# US 12,009,157 B2 · Multilayer ceramic capacitor

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- Number: US 12,009,157 B2
- Document ID: US12009157B2
- Status: Granted
- Kind: B2
- Application number: 18/218,300
- Filed: 2023-07-05
- Published: 2023-11-02
- Granted: 2024-06-11
- Earliest claimed: 2020-09-30
- Assignees: Murata Manufacturing Co., Ltd.
- Applicants: Murata Manufacturing Co., Ltd.
- Inventors: Keita Kitahara; Yuta Saito; Noriyuki Ookawa; Riyousuke Akazawa; Takefumi Takahashi; Masahiro Wakashima; Yuta Kurosu; Akito Mori
- Web page: https://patentgrep.com/patent/US12009157B2

## CPC

- H01G 4/30: Stacked capacitors (H01G4/33 takes precedence)
- H01G 4/008: Selection of materials
- H01G 4/0085: {Fried electrodes}
- H01G 4/012: Form of non-self-supporting electrodes
- H01G 4/1218: {based on titanium oxides or titanates (H01G4/1245 takes precedence)}
- H01G 4/232: electrically connecting two or more layers of a stacked or rolled capacitor
- H01G 4/1227: {based on alkaline earth titanates}
- H01G: CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE (selection of specified materials as dielectric H01B3/00; capacitors having potential barriers H10D1/62, H10K10/10)

## Abstract

In a multilayer ceramic capacitor, a positional deviation in a lamination direction between end portions in a width direction intersecting the lamination direction and a length direction, of two of internal electrode layers adjacent to each other in the lamination direction, is about 5 μm or less. A connection ratio N1/N0 at the middle portion thereof, and a connection ratio N2/N0 at the end portion thereof are about 90% or more, respectively, and a difference between N1/N0 and N2/N0 is about 10% or less.

## Claims

### Claim 1

A multilayer ceramic capacitor comprising:
a multilayer body including:
a plurality of ceramic layers laminated therein;
a first main surface and a second main surface opposed to each other in a height direction;
a first side surface and a second side surface opposed to each other in a width direction orthogonal or substantially orthogonal to the height direction;
a first end surface and a second end surface opposed to each other in a length direction orthogonal or substantially orthogonal to the height direction and the width direction;
first internal electrode layers alternately laminated with the plurality of ceramic layers therein and exposed at the first end surface; and
second internal electrode layers alternately laminated with the plurality of ceramic layers therein and exposed at the second end surface;
a first external electrode on the first end surface; and
a second external electrode on the second end surface; wherein
a ratio of a number of the first internal electrodes and the second internal electrodes which are not connected to any of the first external electrode and the second external electrode in a cross section in the length direction and the height direction at a middle portion in the width direction to a number of the first internal electrodes and the second internal electrodes which are connected to any of the first external electrode and the second external electrode is about 10% or less.

### Claim 2 (depends on 1)

The multilayer ceramic capacitor according to claim 1, wherein a distance between end portions in the width direction of the first internal electrode layers and the second internal electrode layers adjacent to each other in the height direction is about 5 μm or less.

### Claim 3 (depends on 2)

The multilayer ceramic capacitor according to claim 2, wherein a ratio of a number of the first internal electrodes and the second internal electrodes which are not connected to any of the first external electrode and the second external electrode in a cross section in the length direction and the height direction at an end portion in the width direction to a number of the first internal electrodes and the second internal electrodes which are connected to any of the first external electrode and the second external electrode is about 10% or less.

### Claim 4 (depends on 3)

The multilayer ceramic capacitor according to claim 3, wherein the plurality of ceramic layers each have a thickness of about 0.4 μm or more and about 0.6 μm or less.

### Claim 5 (depends on 2)

The multilayer ceramic capacitor according to claim 2, wherein a metal included in the first internal electrode layers and the second internal electrode layers is included in a higher density on a side adjacent to the first internal electrode layers of the first external electrode and on a side adjacent to the second internal electrode layers of the second external electrode, than a portion other than the side adjacent to the first internal electrode layers of the first external electrode and a portion other than the side adjacent to the second internal electrode layers of the second external electrode.

### Claim 6 (depends on 2)

The multilayer ceramic capacitor according to claim 2, wherein the plurality of ceramic layers each have a thickness of about 0.4 μm or more and about 0.6 μm or less.

### Claim 7 (depends on 1)

The multilayer ceramic capacitor according to claim 1, wherein a ratio of a number of the first internal electrodes and the second internal electrodes which are not connected to any of the first external electrode and the second external electrode in a cross section in the length direction and the height direction at an end portion in the width direction to a number of the first internal electrodes and the second internal electrodes which are connected to any of the first external electrode and the second external electrode is about 10% or less.

### Claim 8 (depends on 7)

The multilayer ceramic capacitor according to claim 7, wherein a metal included in the first internal electrode layers and the second internal electrode layers is included in a higher density on a side adjacent to the first internal electrode layers of the first external electrode and on a side adjacent to the second internal electrode layers of the second external electrode, than a portion other than the side adjacent to the first internal electrode layers of the first external electrode and a portion other than the side adjacent to the second internal electrode layers of the second external electrode.

### Claim 9 (depends on 7)

The multilayer ceramic capacitor according to claim 7, wherein the plurality of ceramic layers each have a thickness of about 0.4 μm or more and about 0.6 μm or less.

### Claim 10 (depends on 1)

The multilayer ceramic capacitor according to claim 1, wherein a metal included in the first internal electrode layers and the second internal electrode layers is included in a higher density on a side adjacent to the first internal electrode layers of the first external electrode and on a side adjacent to the second internal electrode layers of the second external electrode, than a portion other than the side adjacent to the first internal electrode layers of the first external electrode and a portion other than the side adjacent to the second internal electrode layers of the second external electrode.

### Claim 11 (depends on 1)

The multilayer ceramic capacitor according to claim 1, wherein the plurality of ceramic layers each have a thickness of about 0.4 μm or more and about 0.6 μm or less.