# US 12,763,258 B2 · Multilayer electronic component with protective layer disposed on a corner

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- Number: US 12,763,258 B2
- Document ID: US12763258B2
- Status: Granted
- Kind: B2
- Application number: 18/386,090
- Filed: 2023-11-01
- Published: 2024-06-13
- Granted: 2026-10-13
- Earliest claimed: 2022-12-13
- Assignees: Samsung Electro-Mechanics Co., Ltd.
- Applicants: Samsung Electro-Mechanics Co., Ltd.
- Inventors: Bum Suk Kang; Dae Woo Yoon; Da Mi Kim; Su Jin Lee
- Web page: https://patentgrep.com/patent/US12763258B2

## CPC

- H01G 4/2325: {characterised by the material of the terminals}
- H01G 4/30: Stacked capacitors (H01G4/33 takes precedence)
- H01G 4/12: Ceramic dielectrics {(H01G4/085 takes precedence)}
- 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

A protective layer including glass may be disposed between an end of a first electrode layer in contact with one end of an internal electrode and a body thereby blocking a penetration path of external moisture, a plating solution, and hydrogen to improve the moisture resistance reliability of a multilayer electronic component.

## Claims

### Claim 1

A multilayer electronic component comprising:
a body comprising:
a dielectric layer; and
first and second internal electrodes alternately arranged with the dielectric layer interposed therebetween in a first direction,
wherein the body includes: first and second surfaces opposing each other in the first direction, third and fourth surfaces opposing each other in a second direction and connected to the first and second surfaces, fifth and sixth surfaces opposing each other in a third direction and connected to the first to fourth surfaces, a first corner connecting the third surface to the first, second, fifth, and sixth surfaces, and a second corner for connecting the fourth surface to the first, second, fifth and sixth surfaces;
a first external electrode disposed on the third surface, the first external electrode including a first-first electrode layer disposed on the third surface and the first corner, and a first-second electrode layer disposed on the first-first electrode layer and extends to a portion of the first, second, fifth, and sixth surfaces;
a second external electrode disposed on the fourth surface, the second external electrode including a second-first electrode layer disposed on the fourth surface and the second corner, and a second-second electrode layer disposed on the second-first electrode layer and extends to a portion of the first, second, fifth, and sixth surfaces; and
a protective layer including a first glass and disposed between the first-first electrode layer and the first corner and between the second-first electrode layer and the second corner,
wherein the protective layer is disposed to be spaced apart from: (i) an extension line extending along the first direction and from a first end of an outermost of the first internal electrodes, where the first end is closer to the fourth surface than to the third surface, and (ii) an extension line extending along the first direction and from a second end of an outermost of the second internal electrodes, where the second end is closer to the third surface than to the fourth surface.

### Claim 2 (depends on 1)

The multilayer electronic component according to claim 1, wherein an average distance from an extension line of the second surface to a first directional end of the protective layer disposed on the first corner is 0.1 μm or more and 10 μm or less.

### Claim 3 (depends on 1)

The multilayer electronic component according to claim 1, wherein an average distance from an extension line of the third surface to a second directional end of the protective layer disposed on the first corner is less than or equal to twice an average thickness of the first-first electrode layer.

### Claim 4 (depends on 1)

The multilayer electronic component according to claim 1, wherein the first-second and second-second electrode layers include a second glass, and at least a portion of the second glass is disposed between a portion of a remainder of the first-second and second-second electrode layers and the first and second surfaces.

### Claim 5 (depends on 4)

The multilayer electronic component according to claim 4, wherein an average distance from an extension line of the third surface to a second directional end of the protective layer disposed on the first corner is 1.01 or more and 50 or less as compared to an average thickness of the at least the portion of the second glass.

### Claim 6 (depends on 4)

The multilayer electronic component according to claim 4, wherein the first-first and second-first electrode layers include a third glass including at least one of Ba and Zn, and
the first-second and second-second electrode layers include a fourth glass including at least one of Na and Fe.

### Claim 7 (depends on 1)

The multilayer electronic component according to claim 1, wherein the first glass includes at least one of Na and Fe.

### Claim 8 (depends on 7)

The multilayer electronic component according to claim 7, wherein the first glass includes Fe.

### Claim 9 (depends on 1)

The multilayer electronic component according to claim 1, wherein at least one of the first-second and second-second electrode layers include Cu,
the first glass includes Na and Fe,
an average content of Na included in the protective layer is 1.25 wt % or more and 15.65 wt % or less as compared to Cu included in the at least one of the first-second and second-second electrode layers, and
an average content of Fe included in the protective layer is 0.15 wt % or more and 5.45 wt % or less as compared to Cu included in the at least one of the first-second and second-second electrode layers.

### Claim 10 (depends on 1)

The multilayer electronic component according to claim 1, wherein the first-first and second-first electrode layers include Ni, and
the first-second and second-second electrode layers include Cu.

### Claim 11 (depends on 1)

The multilayer electronic component according to claim 1, wherein the first glass includes an oxide including Fe.

### Claim 12 (depends on 11)

The multilayer electronic component according to claim 11, wherein the oxide including Fe is FeOx, where x is a positive rational number excluding 0.

### Claim 13 (depends on 1)

The multilayer electronic component according to claim 1, wherein the first external electrode may further include a first additional electrode layer disposed between the first-first electrode layer and the first-second electrode layer, and the second external electrode may further include a second additional electrode layer disposed between the second-first electrode layer and the second-second electrode layer.

### Claim 14 (depends on 13)

The multilayer electronic component according to claim 13, wherein at least one of the first and second additional electrode layers include Cu and a fifth glass.

### Claim 15 (depends on 13)

The multilayer electronic component according to claim 13, wherein a second directional end of the protective layer is disposed between the first-first electrode layer and the first additional electrode layer, and between the second-first electrode layer and the second additional electrode layer.

### Claim 16

A multilayer electronic component comprising:
a body comprising:
a dielectric layer; and
first and second internal electrodes alternately arranged with the dielectric layer in a first direction,
wherein the body includes first and second surfaces opposing each other in the first direction, third and fourth surfaces opposing each other in a second direction and connected to the first and second surfaces, and fifth and sixth surfaces opposing each other in a third direction and connected to the first to fourth surfaces;
an external electrode disposed on the third and fourth surfaces, the external electrode including:
a first electrode layer including Ni and disposed on the third and fourth surfaces to come into contact with a second directional end of the first and second internal electrodes; and
a second electrode layer including Cu and extending from the first electrode layer to a portion of the first, second, fifth, and sixth surfaces; and
a protective layer including a first glass that includes at least one of Na and Fe,
wherein the protective layer is disposed between an end of the first electrode layer and the body,
wherein the first electrode layer includes a third glass including at least one of Ba and Zn, and
the second electrode layer includes a fourth glass including at least one of Na and Fe.

### Claim 17 (depends on 16)

The multilayer electronic component of claim 16, wherein the first electrode layer is not disposed on the first surface and the second surface.

### Claim 18 (depends on 16)

The multilayer electronic component of claim 16, wherein the protective layer is disposed to be spaced apart from: (i) an extension line extending along the first direction and from a first end of the first internal electrode, where the first end is closer to the fourth surface than to the third surface, and (ii) an extension line extending along the first direction and from a second end of the second internal electrode, where the second end is closer to the third surface than to the fourth surface.

### Claim 19 (depends on 16)

The multilayer electronic component of claim 16, wherein the second electrode layer includes a second glass, and
at least a portion of the second glass is disposed between a portion of a remainder of the second electrode layer and the first and second surfaces.

### Claim 20 (depends on 19)

The multilayer electronic component of claim 19, wherein an average distance from an extension line of the third surface or the fourth surface to a second directional end of the protective layer is 1.01 or more and 50 or less as compared to an average thickness of the at least the portion of the second glass.

### Claim 21 (depends on 16)

The multilayer electronic component of claim 16, wherein the first glass includes Na and Fe.

### Claim 22 (depends on 16)

The multilayer electronic component of claim 16, wherein the first glass includes an oxide including Fe.

### Claim 23 (depends on 16)

The multilayer electronic component of claim 16, wherein the external electrode further includes an additional electrode layer disposed between the first electrode layer and the second electrode layer.

### Claim 24 (depends on 23)

The multilayer electronic component of claim 23, wherein the additional electrode layer includes Cu and a fifth glass.

### Claim 25 (depends on 24)

The multilayer electronic component of claim 24, wherein a second directional end of the protective layer is disposed between the first electrode layer and the additional electrode layer.

### Claim 26

A multilayer electronic component comprising:
a body comprising:
a dielectric layer; and
first and second internal electrodes alternately arranged with the dielectric layer in a first direction, wherein the body includes first and second surfaces opposing each other in the first direction, third and fourth surfaces opposing each other in a second direction and connected to the first and second surfaces, and fifth and sixth surfaces opposing each other in a third direction and connected to the first to fourth surfaces;
an external electrode disposed on the third and fourth surfaces, the external electrode including:
a first electrode layer including a first conductive metal and disposed on the third surface and the fourth surface to come into contact with a second directional end of the first and second internal electrodes; and
a second electrode layer including a second conductive metal and a second glass, and extending from the first electrode layer to a portion of the first, second, fifth, and sixth surfaces; and
a protective layer including a first glass disposed between the body and an end of the first electrode layer,
wherein wettability of the second glass with respect to the first conductive metal is greater than that of the second glass with respect to the second conductive metal.

### Claim 27 (depends on 26)

The multilayer electronic component of claim 26, wherein, when an average contact angle of the second glass with respect to the first conductive metal is a first angle, and an average contact angle of the second glass with respect to the second conductive metal is a second angle, the first angle is smaller than the second angle.

### Claim 28 (depends on 27)

The multilayer electronic component of claim 27, wherein the protective layer is disposed to be spaced apart from: (i) an extension line extending along the first direction and from a first end of the first internal electrode, where the first end is closer to the fourth surface than to the third surface, and (ii) an extension line extending along the first direction and from a second end of the second internal electrode, where the second end is closer to the third surface than to the fourth surface.

### Claim 29 (depends on 27)

The multilayer electronic component of claim 27, wherein an absolute value of a difference between the first angle and the second angle is 10 degrees or more and 50 degrees or less.

### Claim 30 (depends on 26)

The multilayer electronic component of claim 26, wherein the first conductive metal is Ni and the second conductive metal is Cu.

### Claim 31 (depends on 26)

The multilayer electronic component of claim 26, wherein the second glass includes at least one of Na and Fe.

### Claim 32 (depends on 26)

The multilayer electronic component of claim 26, wherein the first electrode layer further includes a third glass, and
the third glass includes at least one of Ba and Zn.

### Claim 33 (depends on 26)

The multilayer electronic component of claim 26, wherein the first electrode layer is not disposed on the first surface and the second surface.

### Claim 34 (depends on 26)

The multilayer electronic component of claim 26, wherein at least a portion of the second glass is disposed between a portion of a remainder of the second electrode layer and the first and second surfaces.

### Claim 35 (depends on 34)

The multilayer electronic component of claim 34, wherein an average distance from an extension line of the third surface or the fourth surface to a second directional end of the protective layer is 1.01 or more and 50 or less as compared to an average thickness of the at least the portion of the second glass.

### Claim 36 (depends on 26)

The multilayer electronic component of claim 26, wherein the first glass includes an oxide including Fe.

### Claim 37 (depends on 26)

The multilayer electronic component of claim 26, wherein the external electrode further includes an additional electrode layer disposed between the first electrode layer and the second electrode layer.

### Claim 38 (depends on 37)

The multilayer electronic component of claim 37, wherein the additional electrode layer includes Cu and a fourth glass.

### Claim 39 (depends on 38)

The multilayer electronic component of claim 38, wherein a second directional end of the protective layer is disposed between the first electrode layer and the additional electrode layer.

### Claim 40

A multilayer electronic component comprising:
a body comprising:
a dielectric layer; and
first and second internal electrodes alternately arranged with the dielectric layer in a first direction;
an external electrode disposed on the body, the external electrode including:
a first electrode layer including a first conductive metal and disposed on the body to come into contact with a second directional end of the first and second internal electrodes; and
a second electrode layer including a second conductive metal and a second glass, and disposed on the first electrode layer; and
a protective layer disposed between an end of the first electrode layer and the body,
wherein wettability of the second glass with respect to the first conductive metal is greater than that of the second glass with respect to the second conductive metal.

### Claim 41 (depends on 40)

The multilayer electronic component of claim 40, wherein the first and second conductive metals are different.

### Claim 42 (depends on 41)

The multilayer electronic component of claim 41, wherein the first conductive metal includes Ni.

### Claim 43 (depends on 41)

The multilayer electronic component of claim 41, wherein the second conductive metal includes Cu.

### Claim 44 (depends on 43)

The multilayer electronic component of claim 43, wherein an average content of Fe included in the protective layer is 0.15 wt % or more and 5.45 wt % or less as compared to Cu included in the second electrode layer.

### Claim 45

A multilayer electronic component comprising:
a body comprising:
a dielectric layer; and
first and second internal electrodes alternately arranged with the dielectric layer in a first direction;
an external electrode disposed on the body, the external electrode including:
a first electrode layer including a first conductive metal and disposed on the body to come into contact with a second directional end of the first and second internal electrodes; and
a second electrode layer including a second conductive metal and a second glass, and disposed on the first electrode layer; and
a protective layer including a first glass that includes Fe, wherein the protective layer is disposed between the body and an end of the first electrode layer,
wherein wettability of the second glass with respect to the first conductive metal is greater than that of the second glass with respect to the second conductive metal.

### Claim 46 (depends on 45)

The multilayer electronic component of claim 45, wherein the first conductive metal includes Ni.

### Claim 47 (depends on 45)

The multilayer electronic component of claim 45, wherein the second conductive metal includes Cu.

### Claim 48 (depends on 45)

The multilayer electronic component of claim 45, wherein an average content of Fe included in the protective layer is 0.15 wt % or more and 5.45 wt % or less as compared to Cu included in the second electrode layer.

### Claim 49 (depends on 45)

The multilayer electronic component of claim 45, wherein the protective layer covers a corner of the body.

### Claim 50 (depends on 45)

The multilayer electronic component of claim 45, wherein the first glass further includes Na.