# US 10,501,374 B2 · Dielectric composition, dielectric element, electronic component and laminated electronic component

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- Number: US 10,501,374 B2
- Document ID: US10501374B2
- Status: Granted
- Kind: B2
- Application number: 15/577,318
- Filed: 2016-05-24
- Published: 2018-06-07
- Granted: 2019-12-10
- Earliest claimed: 2015-05-27
- Assignees: TDK Electronics Co., Ltd.
- Applicants: TDK Electronics AG
- Inventors: Tomohiro Terada; Yu Katagi; Tomoya Imura
- Web page: https://patentgrep.com/patent/US10501374B2

## CPC

- C04B 35/475: based on bismuth titanates
- C04B 35/47: based on strontium titanates
- C04B 35/638: Removal thereof
- C04B 35/64: Burning or sintering processes (C04B33/32 takes precedence {; powder metallurgy B22F})
- C04B 41/4578: {Coating or impregnating of green ceramics or unset concrete}
- H01G 4/008: Selection of materials
- H01G 4/1218: {based on titanium oxides or titanates (H01G4/1245 takes precedence)}
- H01G 4/1227: {based on alkaline earth titanates}
- H01G 4/228: Terminals
- H01G 4/30: Stacked capacitors (H01G4/33 takes precedence)
- C04B 2235/3201: Alkali metal oxides or oxide-forming salts thereof
- C04B 2235/3203: Lithium oxide or oxide-forming salts thereof
- C04B 2235/3206: Magnesium oxides or oxide-forming salts thereof
- C04B 2235/3213: Strontium oxides or oxide-forming salts thereof
- C04B 2235/3224: Rare earth oxide or oxide forming salts thereof, e.g. scandium oxide
- C04B 2235/3225: Yttrium oxide or oxide-forming salts thereof
- C04B 2235/3227: Lanthanum oxide or oxide-forming salts thereof
- C04B 2235/3229: Cerium oxides or oxide-forming salts thereof
- C04B 2235/3236: Alkaline earth titanates
- C04B 2235/3262: Manganese oxides, manganates, rhenium oxides or oxide-forming salts thereof, e.g. MnO
- C04B 2235/3275: Cobalt oxides, cobaltates or cobaltites or oxide forming salts thereof, e.g. bismuth cobaltate, zinc cobaltite
- C04B 2235/3281: Copper oxides, cuprates or oxide-forming salts thereof, e.g. CuO or Cu2O
- C04B 2235/3284: Zinc oxides, zincates, cadmium oxides, cadmiates, mercury oxides, mercurates or oxide forming salts thereof
- C04B 2235/3298: Bismuth oxides, bismuthates or oxide forming salts thereof, e.g. zinc bismuthate
- C04B 2235/6025: Tape casting, e.g. with a doctor blade
- C04B 2235/656: characterised by specific heating conditions during heat treatment
- C04B 2235/80: Phases present in the sintered or melt-cast ceramic products other than the main phase
- C04B 2237/595: whereby the interlayer is continuous, but heterogeneous on macro-scale, e.g. one part of the interlayer being a joining material, another part being an electrode material
- 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
- 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

The present invention relates to a dielectric composition having a main component and an auxiliary component. The main component is represented by (BiaNabSrcLnd)TiO3, where Ln comprises a rare earth element 0.100≤a≤0.400, 0.100≤b≤0.400, 0.100≤c≤0.700, 0≤d≤0.100, and 0.900≤a+b+c+d≤1.50. The auxiliary component contains a first auxiliary component or a second auxiliary component. The first auxiliary component includes an element selected from the group consisting of Li and K and combinations thereof and the second auxiliary component includes an element selected from the group consisting of Cu, Zn, Mn, Mg and Co and combinations thereof.

## Claims

### Claim 1

A dielectric composition comprising:
a main component represented by (BiaNabSrcLnd)TiO3,
where
Ln comprises a rare earth element;
0.100≤a≤0.400;
0.100≤b≤0.400
0.100≤c≤0.700;
0≤d≤0.100; and
0.900≤a+b+c+d≤0.050; and
an auxiliary component containing a first auxiliary component or a second auxiliary component,
wherein the first auxiliary component comprises, and
wherein the second auxiliary component comprises an element selected from the group consisting of Cu, Zn, Co and combinations thereof.

### Claim 2 (depends on 1)

The dielectric composition according to claim 1, wherein the auxiliary component contains both the first auxiliary component and the second auxiliary component.

### Claim 3 (depends on 1)

The dielectric composition according to claim 1, wherein the dielectric composition contains at least 0.5 molar parts and less than 7 molar parts of the first auxiliary component, with respect to 100 molar parts of Ti contained in the main component.

### Claim 4 (depends on 1)

The dielectric composition according to claim 1, wherein the dielectric composition contains at least 0.05 molar parts and less than 5 molar parts of the second auxiliary component, with respect to 100 molar parts of Ti contained in the main component.

### Claim 5 (depends on 1)

A laminated electronic component comprising:
a laminated portion formed by alternately laminating a plurality of internal electrode layers and dielectric layers, each dielectric layer comprising the dielectric composition according to claim 1.

### Claim 6 (depends on 5)

The laminated electronic component according to claim 5, wherein the internal electrode layers are formed using a paste, and wherein the paste is prepared by mixing a conductive material comprising metals, alloys, or compounds that form the conductive material after baking, organometallic compounds and resinates with an organic vehicle or an aqueous vehicle.

### Claim 7 (depends on 5)

The laminated electronic component according to claim 5, wherein the internal electrode layers comprise Ag, Ag—Pd alloy, Ni or Cu.

### Claim 8 (depends on 5)

The laminated electronic component according to claim 5, further comprising terminal electrodes constructed from a conductive material.

### Claim 9 (depends on 8)

The laminated electronic component according to claim 8, wherein the terminal electrodes having comprise Ag, Au or Cu as a main component.

### Claim 10 (depends on 5)

The laminated electronic component according to claim 5, wherein the laminated electronic component is a laminated ceramic capacitor.