Multilayer ceramic electronic component

Patent metadata

Field	Value
Publication number	US-11017953-B2
Application number	US-202016943463-A
Country	US
Kind code	B2
Filing date	Jul 30, 2020
Priority date	Nov 9, 2018
Publication date	May 25, 2021
Grant date	May 25, 2021

Abstract

A multilayer ceramic electronic component includes: a ceramic body having a dielectric layer, and a plurality of first and second internal electrodes facing each other with the dielectric layer interposed therebetween; and first and second external electrodes disposed on an outer surface of the ceramic body, respectively. The ceramic body includes an active portion including a plurality of internal electrodes facing each other with the dielectric layer interposed therebetween to form capacitance, and cover portions formed on upper and lower portions of the active portion. A buffer region is disposed between at least one pair of first and second internal electrodes among the plurality of first and second internal electrodes disposed inside the active portion, and satisfies the relation 0<tb<150 μm+td, where td is a thickness of the dielectric layer, and tb is a thickness of the buffer region.

First claim

What is claimed is:

1. A multilayer ceramic electronic component comprising:
a ceramic body including a plurality of dielectric layers and a plurality of first and second internal electrodes facing each other with the plurality of dielectric layers interposed therebetween, respectively, and having first and second surfaces facing each other in a stacking direction, third and fourth surfaces connected to the first and second surfaces and facing each other in a length direction, and fifth and sixth surfaces connected to the first to fourth surfaces and facing each other in a width direction; and
first and second external electrodes disposed on the third and fourth surfaces of the ceramic body, respectively, and electrically connected to the plurality of first and second internal electrodes, respectively,
wherein the ceramic body includes an active portion including the plurality of first and second internal electrodes, and cover portions disposed on upper and lower surfaces of the active portion in the stacking direction,
wherein a buffer region is disposed between at least one pair of first and second internal electrodes among the plurality of first and second internal electrodes disposed inside the active portion,
wherein at least one dielectric layer among the plurality of dielectric layers is disposed on an upper or lower surface of the buffer region and is in direct contact with the buffer region,
wherein a dielectric material of the buffer region is different from a dielectric material of the dielectric layer, and
wherein one surface of the buffer region is in contact with one of the at least one pair of first and second internal electrodes.

2. The multilayer ceramic electronic component of claim 1 , a thickness of the buffer region satisfies the relation of 0<tb<150 μm+td, where a thickness of each dielectric layer is denoted by “td”, and the thickness of the buffer region is denoted by “tb”.

3. The multilayer ceramic electronic component of claim 1 , wherein the buffer region is disposed in a center portion of the ceramic body as a single layer.

4. The multilayer ceramic electronic component of claim 1 , wherein the buffer region is disposed in plural inside the active portion.

5. The multilayer ceramic electronic component of claim 1 , wherein a thickness of each of the plurality of first and second internal electrodes is denoted by “te”, and te is less than 1 μm.

6. The multilayer ceramic electronic component of claim 5 , wherein the thickness te of each of the plurality of first and second internal electrodes is 0.2 μm or more.

7. The multilayer ceramic electronic component of claim 1 , wherein each of the first and second external electrodes includes an electrode layer electrically connected to the plurality of first or second internal electrodes, and a conductive resin layer disposed on the electrode layer, and
the electrode layer and the conductive resin layer are each extend in the length direction on the first and second surfaces of the ceramic body.

8. The multilayer ceramic electronic component of claim 7 , wherein a length of an extending portion of the electrode layer, measured from a corner edge of the electrode layer close to the third or fourth surface to an end of the extending portion of the electrode layer extending on the respective first or second surface, is smaller than a length of an extending portion of the conductive resin layer, measured from a corner edge of the conductive resin layer close to the third or fourth surface to an end of the extending portion of the conductive resin layer extending on the respective first or second surface.

9. The multilayer ceramic electronic component of claim 7 , wherein the electrode layer includes at least one conductive metal selected from the group consisting of copper (Cu), silver (Ag), nickel (Ni), and alloys thereof.

10. The multilayer ceramic electronic component of claim 7 , wherein the conductive resin layer includes a base resin and at least one conductive metal selected from the group consisting of copper (Cu), silver (Ag), nickel (Ni), and alloys thereof.

11. The multilayer ceramic electronic component of claim 1 , wherein the active portion is divided by a plurality of pairs comprising one first internal electrode and one second internal electrode, and the buffer region is disposed between a first pair of the plurality of pairs and a second pair adjacent to the first pair.

12. The multilayer ceramic electronic component of claim 11 , wherein one surface of the buffer region is in contact with one second internal electrode of the second pair, and another surface of the buffer region is spaced apart from the one first internal electrode of the first pair.

Assignees

• Samsung Electro Mech

Inventors

• Kim Kyeong Jun
• Lee Jang Hyun
• Chung Hae Suk
• Lee Do
• Kang Byung Sung
• Jun Ho In

Classifications

• H01G4/30 Primary

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

• H01G4/232

  electrically connecting two or more layers of a stacked or rolled capacitor · CPC title

• H01G4/1209

  characterised by the ceramic dielectric material (H01G4/1272, H01G4/1281 take precedence) · CPC title

• H01G4/012 Primary

  Form of non-self-supporting electrodes · CPC title

• H01G4/12 Primary

  Ceramic dielectrics {(H01G4/085 takes precedence)} · CPC title