Method of manufacturing multilayer ceramic electronic component and multilayer ceramic electronic component

Patent metadata

Field	Value
Publication number	US-11062849-B2
Application number	US-201816204903-A
Country	US
Kind code	B2
Filing date	Nov 29, 2018
Priority date	Oct 5, 2018
Publication date	Jul 13, 2021
Grant date	Jul 13, 2021

Abstract

A method of manufacturing a multilayer ceramic electronic component includes: preparing a dielectric magnetic composition including base material powder particles including BaTi2O5 or (Ba(1-x)Cax)Ti2O5 (0≤x<0.1), the base material powder particles having surfaces coated with one or more of Mg, Mn, V, Ba, Si, Al and a rare earth metal; preparing ceramic green sheets using dielectric slurry including the dielectric magnetic composition; applying an internal electrode paste to the ceramic green sheets; preparing a green sheet laminate by stacking the ceramic green sheets to which the internal electrode paste is applied; and preparing a ceramic body including dielectric layers and a plurality of first and second internal electrodes arranged to face each other with each of the dielectric layers interposed therebetween by sintering the green sheet laminate.

First claim

What is claimed is:

1. A method of manufacturing a multilayer ceramic electronic component, comprising:
preparing a dielectric magnetic composition including base material powder particles including BaTi 2 O 5 or (Ba (1-x) Ca x ) Ti 2 O 5 (o≤x<0.1), the base material powder particles having surfaces coated with at least one selected from the group of Mg, Mn, V, Ba, Si, Al and a rare earth metal;
preparing ceramic green sheets using dielectric slurry including the dielectric magnetic composition;
applying an internal electrode paste to the ceramic green sheets;
preparing a green sheet laminate by stacking the ceramic green sheets to which the internal electrode paste is applied; and
preparing a ceramic body including dielectric layers and a plurality of first and second internal electrodes arranged to face each other with each of the dielectric layers interposed therebetween by sintering the green sheet laminate,
wherein a region of one of the dielectric layers having a content of nickel (Ni) from a boundary of one of the first and second internal electrodes immediately adjacent to the one of the dielectric layers is formed by sintering, and
t 2 >t 3 , where t 3 is a thickness of the region of the one of the dielectric layers in which the content of nickel (Ni) is 3 wt % or less from the boundary of the one of the first and second internal electrodes immediately adjacent to the one of the dielectric layers, and t 2 is a thickness of the one of the first and second internal electrodes immediately adjacent to the one of the dielectric layers.

2. The method of claim 1 , wherein a content of the at least one selected from the group of Mg, Mn, V, Ba, Si, Al and a rare earth metal is 2 parts by mol or less based on 100 parts by mol of Ti of elements of the base material powder particles.

3. The method of claim 1 , wherein the base material powder particles have surfaces coated with the rare earth metal, and the rare earth metal includes at least one selected from the group consisting of Y, Dy, Ho, La, Ce, Nd, Sm, Gd, and Er.

4. The method of claim 1 , wherein 0≤x≤0.07.

5. The method of claim 1 , wherein the one of dielectric layers has a thickness less than 10.0 μm.

6. The method of claim 1 , wherein the one of the first and second internal electrodes has a thickness less than 2 μm.

7. The method of claim 1 , wherein t 1 >2×t 2 in which t 1 is a thickness of the one of the dielectric layers.

8. The method of claim 1 , wherein a plurality of floating electrodes are further arranged in the ceramic body to be offset from the first and second internal electrodes in a thickness direction, and have opposite end portions overlapping, respectively, portions of the first and second internal electrodes.

9. The method of claim 1 , wherein the ceramic body includes an active portion including the plurality of first and second internal electrodes disposed to face each other and cover portions formed on upper and lower surfaces of the active portion, respectively, and
first and second dummy electrodes are arranged in the cover portions to be spaced apart from each other.

10. The method of claim 9 , wherein the first dummy electrodes are exposed to the same surface as a surface of the ceramic body to which the first internal electrodes are exposed, and the second dummy electrodes are exposed to the same surface as a surface of the ceramic body to which the second internal electrodes are exposed.

11. The method of claim 1 , further comprising, after the preparing of the ceramic body, forming external electrodes on external surfaces of the ceramic body.

12. The method of claim 11 , wherein the external electrodes include electrode layers electrically connected to the first and second internal electrodes, conductive resin layers disposed on the electrode layers, and plating layers disposed on the conductive resin layers, respectively.

13. The method of claim 12 , wherein the plating layers include nickel (Ni) plating layers disposed on the conductive resin layers and palladium (Pd) plating layers disposed on the nickel (Ni) plating layers, respectively.

14. The method of claim 1 , wherein the base material powder particles have an average particle size of 150 nm or less.

Assignees

• Samsung Electro Mech

Inventors

• Choi Du Won
• Woo Seok Kyoon
• Jo Ji Hong

Classifications

• H01G4/252

  the terminals being coated on the capacitive element (H01G4/232 takes precedence) · CPC title

• H01G4/2325

  characterised by the material of the terminals · CPC title

• H01G4/1227 Primary

  based on alkaline earth titanates · CPC title

• H01G4/005

  Electrodes · CPC title

• H01G4/30 Primary

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