Multilayer electronic component

Patent metadata

Field	Value
Publication number	US-11710600-B2
Application number	US-202016987684-A
Country	US
Kind code	B2
Filing date	Aug 7, 2020
Priority date	Aug 28, 2019
Publication date	Jul 25, 2023
Grant date	Jul 25, 2023

Abstract

A multilayer electronic component that includes a stacked body having therein a plurality of dielectric layers including a CZ-based perovskite phase and an element M1, a plurality of internal electrode layers including Cu, and an interface layer including the element M1 in at least a portion of an interface with the plurality of internal electrode layers. Element M1 is an element that has a binding energy between CZ and Cu via the element M1 of less than or equal to −9.8 eV by first-principles calculation using a pseudopotential method. When amounts of elements included in the dielectric layers are expressed as parts by mol, a ratio m1 of an amount of the element M1 to an amount of the Zr in the interface layer is 0.03≤m1≤0.25.

First claim

What is claimed is:

1. A multilayer electronic component comprising:
a stacked body having therein a plurality of dielectric layers including a CaZrO 3 -based perovskite phase and an element M1, a plurality of internal electrode layers including Cu, and an interface layer including the element M1 in a solid state dissolved form in a in a vicinity of grain boundaries of crystal grains of the CaZrO 3 -based perovskite phase in contact with the plurality of internal electrode layers, wherein
the element M1 is an element having a binding energy between CaZrO 3 and Cu via the element M1 of less than or equal to −9.8 eV by first-principles calculation using a pseudopotential method, and
when amounts of elements included in the plurality of dielectric layers are expressed as parts by mol, a ratio m1 of an amount of the element M1 to an amount of the Zr in the interface layer is 0.03≤m1≤0.25, and the interface layer contains more of the element M1 than the plurality of dielectric layers.

2. The multilayer electronic component according to claim 1 , wherein the element M1 is at least one element selected from Al, Si, Mn, Ti and V.

3. The multilayer electronic component according to claim 2 , wherein
the plurality of dielectric layers further include a secondary phase including the element M1, and
the secondary phase is at least partially included in the interface layer.

4. The multilayer electronic component according to claim 1 , wherein
the plurality of dielectric layers further include a secondary phase including the element M1, and
the secondary phase is at least partially included in the interface layer.

5. The multilayer electronic component according to claim 1 , wherein the binding energy between the CaZrO 3 and the Cu via the element M1 is less than −12.0 eV by the first-principles calculation using the pseudopotential method.

6. The multilayer electronic component according to claim 5 , wherein the element M1 is selected from Mn, Ti and V.

7. The multilayer electronic component according to claim 6 , wherein
the plurality of dielectric layers further include a secondary phase including the element M1, and
the secondary phase is at least partially included in the interface layer.

8. The multilayer electronic component according to claim 5 , wherein
the plurality of dielectric layers further include a secondary phase including the element M1, and
the secondary phase is at least partially included in the interface layer.

Assignees

• Murata Manufacturing Co

Inventors

• Izumi Tatsuya
• Hirata Tomotaka

Classifications

• H01G4/30 Primary

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

• C04B35/057

  based on calcium oxide · CPC title

• H01G4/008

  Selection of materials · CPC title

• H01G4/012

  Form of non-self-supporting electrodes · CPC title

• H01G4/1236 Primary

  based on zirconium oxides or zirconates (H01G4/1263 takes precedence) · CPC title