Dielectric composition and multilayered electronic component comprising the same

Patent metadata

Field	Value
Publication number	US-12340942-B2
Application number	US-202418631625-A
Country	US
Kind code	B2
Filing date	Apr 10, 2024
Priority date	Jun 28, 2019
Publication date	Jun 24, 2025
Grant date	Jun 24, 2025

Abstract

A dielectric composition includes a main ingredient having a perovskite structure represented by ABO3, where A is at least one of Ba, Sr, and Ca and B is at least one of Ti, Zr, and Hf, and a first accessory ingredient. The first accessory ingredient comprises 0.1 mole or more of a rare earth element, 0.02 mole or more of Nb, and 0.25 mole or more and 0.9 mole or less of Mg, a sum of contents of the rare earth element and Nb is 1.5 mole or less.

First claim

What is claimed is:

1. A multilayer electronic component, comprising:
a body including a dielectric layer and an internal electrode; and
an external electrode disposed on the body and connected to the internal electrode,
wherein the dielectric layer comprises a dielectric composition,
wherein the dielectric composition comprises a main ingredient having a perovskite structure represented by ABO 3 , where A is at least one of barium, strontium, and calcium and B is at least one of titanium, zirconium, and hafnium, and a first accessory ingredient,
wherein the first accessory ingredient comprises 0.1 mole or more of a rare earth element, 0.02 mole or more of niobium, and 0.25 mole or more of magnesium, and a sum of contents of the rare earth element and Nb is 1.5 mole or less, based on 100 mole of the main ingredient,
wherein the rare earth element is one or more selected from the group consisting of Ho, Y, Er, Yb, and Dy,
wherein the dielectric layer has an average thickness of 0.41 μm or less.

2. The multilayer electronic component of claim 1 , wherein the first accessory ingredient comprises 0.25 mole or more and 0.7 mole or less of Mg, based on 100 mole of the main ingredient.

3. The multilayer electronic component of claim 1 , wherein the first accessory ingredient comprises 0.25 mole or more and 0.467 mole or less of Mg, based on 100 mole of the main ingredient.

4. The multilayer electronic component of claim 1 , wherein the dielectric composition further comprises 0.1 to 2.0 mole of oxides or carbonates including at least one selected from the group consisting of manganese, vanadium, chromium, iron, nickel, cobalt, copper, and zinc, based on 100 mole of the main ingredient, as a second accessory ingredient.

5. The multilayer electronic component of claim 1 , wherein the dielectric composition further comprises 0.001 to 0.5 mole of an oxide including at least one of silicon and aluminum, or a glass compound including Si, based on 100 mole of the main ingredient, as a third accessory ingredient.

6. The multilayer electronic component of claim 1 , wherein the internal electrode has an average thickness of 0.41 μm or less.

7. The multilayer electronic component of claim 1 , wherein a size of the multilayer electronic component is 1005 (length×width, 1.0 mm×0.5 mm) or less.

8. The multilayer electronic component of claim 1 , wherein the dielectric layer comprises a plurality of crystal grains and grain boundaries disposed between adjacent crystal grains, and the Nb is included in the plurality of crystal grains and the grain boundaries.

9. The multilayer electronic component of claim 1 , wherein the dielectric layer comprises a plurality of crystal grains and a grain boundary disposed between adjacent crystal grains, and an average grain size of the crystal grains is 200 nm or less.

Assignees

• Samsung Electro Mech

Inventors

• Ham Tae Young
• Jo Ji Hong
• Baik Seung In
• Kwon Hyung Soon

Classifications

• C04B2235/768

  Perovskite structure ABO3 · CPC title

• C04B2235/3206

  Magnesium oxides or oxide-forming salts thereof · CPC title

• C04B2235/3251

  Niobium oxides, niobates, tantalum oxides, tantalates, or oxide-forming salts thereof · CPC title

• C04B2235/3224

  Rare earth oxide or oxide forming salts thereof, e.g. scandium oxide · CPC title

• C04B2235/3236

  Alkaline earth titanates · CPC title