# US 12,217,911 B2 · Dielectric composition and multilayer capacitor including the same

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- Number: US 12,217,911 B2
- Document ID: US12217911B2
- Status: Granted
- Kind: B2
- Application number: 17/246,274
- Filed: 2021-04-30
- Published: 2022-05-05
- Granted: 2025-02-04
- Earliest claimed: 2020-11-03
- Assignees: Samsung Electro-Mechanics Co., Ltd.
- Applicants: Samsung Electro-Mechanics Co., Ltd.
- Inventors: Jeong Yun Park
- Web page: https://patentgrep.com/patent/US12217911B2

## CPC

- H01G 4/1227: {based on alkaline earth titanates}
- C04B 35/4682: {based on BaTiO3 perovskite phase}
- C04B 35/638: Removal thereof
- H01G 4/232: electrically connecting two or more layers of a stacked or rolled capacitor
- H01G 4/248: the terminals embracing or surrounding the capacitive element, e.g. caps (H01G4/252 takes precedence)
- H01G 4/30: Stacked capacitors (H01G4/33 takes precedence)
- C04B 2235/3206: Magnesium oxides or oxide-forming salts thereof
- C04B 2235/3208: Calcium oxide or oxide-forming salts thereof, e.g. lime
- C04B 2235/3224: Rare earth oxide or oxide forming salts thereof, e.g. scandium oxide
- C04B 2235/3236: Alkaline earth titanates
- C04B 2235/442: Carbonates
- C04B 2235/5454: nanometer sized, i.e. below 100 nm
- C04B 2235/6025: Tape casting, e.g. with a doctor blade
- C04B 2235/6582: Hydrogen containing atmosphere
- C04B 2235/663: Oxidative annealing
- C04B 2235/781: Nanograined materials, i.e. having grain sizes below 100 nm
- C04B 2235/785: Submicron sized grains, i.e. from 0,1 to 1 micron
- 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)
- C04B: LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE {(roofing granules E04D7/005)}; CERAMICS (devitrified glass-ceramics C03C10/00); REFRACTORIES; TREATMENT OF NATURAL STONE

## Abstract

There are provided a dielectric composition and a multilayer capacitor including the same. The dielectric composition contains: barium titanate (BaTiO3); and 0.6 to 0.9 mol of calcium (Ca) and 0.5 to 2.0 mol of magnesium (Mg) based on 100 mol of barium titanate.

## Claims

### Claim 1

A dielectric composition containing:
barium titanate (BaTiO3);
0.6 to 0.9 mol of calcium (Ca);
0.5 to 1.5 mol of magnesium (Mg); and
0.001 to 0.2 mol of terbium (Tb), based on 100 mol of barium titanate (BaTiO3).

### Claim 2 (depends on 1)

The dielectric composition of claim 1, further containing dysprosium (Dy).

### Claim 3 (depends on 2)

The dielectric composition of claim 2, wherein dysprosium (Dy) is included in a form of oxide or carbonate.

### Claim 4 (depends on 2)

The dielectric composition of claim 2, wherein a content of dysprosium (Dy) is 0.8 to 2.0 mol based on 100 mol of barium titanate (BaTiO3).

### Claim 5 (depends on 1)

The dielectric composition of claim 1, wherein a content of terbium (Tb) is 0.001 to 0.2 mol based on 100 mol of barium titanate (BaTiO3).

### Claim 6 (depends on 1)

The dielectric composition of claim 1, wherein terbium (Tb) is included in a form of oxide or carbonate.

### Claim 7

A multilayer capacitor comprising:
a body including dielectric layers and internal electrodes; and
external electrodes disposed on the body so as to be connected to the internal electrodes,
wherein the dielectric layer includes a plurality of dielectric grains each containing barium titanate (BaTiO3), 0.6 to 0.9 mol of calcium (Ca), and 0.5 to 1.5 mol of magnesium (Mg), and 0.001 to 0.2 mol of terbium (Tb) based on 100 mol of barium titanate (BaTiO3).

### Claim 8 (depends on 7)

The multilayer capacitor of claim 7, wherein the dielectric grain further contains dysprosium (Dy).

### Claim 9 (depends on 7)

The multilayer capacitor of claim 7, wherein an average thickness of the dielectric layer is 0.4 μm or less.

### Claim 10 (depends on 7)

The multilayer capacitor of claim 7, wherein each of the dielectric grains has a size of 150 nm or less.

### Claim 11 (depends on 7)

The multilayer capacitor of claim 7, wherein four or more layers of dielectric grains are disposed in the dielectric layer in a direction in which the dielectric layer is stacked.

### Claim 12 (depends on 7)

The multilayer capacitor of claim 7, wherein the body includes first and second surfaces opposing each other, third and fourth surfaces connected to the first and second surfaces and opposing each other, and fifth and sixth surfaces connected to the first and second surfaces, and connected to the third and fourth surfaces, and opposing each other, and
the first and second external electrodes exposed to the third and fourth surfaces of the body, respectively.

### Claim 13 (depends on 12)

The multilayer capacitor of claim 12, wherein the external electrodes include:
a pair of connected portions disposed on the third and fourth surfaces of the body, respectively; and
a pair of band portions respectively extending from the pair of connected portions to the first surface of the body.

### Claim 14 (depends on 12)

The multilayer capacitor of claim 12, wherein the body includes:
an active region including the first and second internal electrodes; and
upper and lower covers disposed on upper and lower surfaces of the active region, respectively.