# US 11,908,848 B2 · Display device including electrode patterns and method of fabricating the same

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- Number: US 11,908,848 B2
- Document ID: US11908848B2
- Status: Granted
- Kind: B2
- Application number: 17/203,496
- Filed: 2021-03-16
- Published: 2021-12-09
- Granted: 2024-02-20
- Earliest claimed: 2020-06-03
- Assignees: Samsung Display Co., Ltd.
- Applicants: Samsung Display Co., Ltd.
- Inventors: Jong Chan Lee; Sang Jun Park; Jeong Hyun Lee; Woong Hee Jeong; Kwang Taek Hong
- Web page: https://patentgrep.com/patent/US11908848B2

## CPC

- H10W 90/00: Package configurations
- H10H 20/857: Interconnections, e.g. lead-frames, bond wires or solder balls
- H10H 20/0364: {of interconnections}
- H10H 20/819: characterised by their shape, e.g. curved or truncated substrates
- H10W: GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10
- H10H: INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS

## Abstract

A display device and a method of fabricating a display device are provided. The display device includes a substrate comprising a contact area and a line area, a first electrode that extends in a first direction on the substrate, a first electrode pattern that extends in the first direction and is spaced apart from the first electrode on the substrate, a second electrode that extends in the first direction and is between the first electrode and the first electrode pattern on the substrate, a second electrode pattern that extends in the first direction and is between the first electrode and the second electrode on the substrate, and a first light-emitting element between the first electrode and the second electrode pattern in the contact area.

## Claims

### Claim 1

A display device comprising:
a substrate comprising a contact area and a line area;
a first electrode that extends in a first direction on the substrate;
a first electrode pattern that extends in the first direction and is spaced apart from the first electrode on the substrate;
a second electrode that extends in the first direction and is between the first electrode and the first electrode pattern on the substrate;
a second electrode pattern that extends in the first direction and is between the first electrode and the second electrode on the substrate;
a first light-emitting element between the first electrode and the second electrode pattern in the contact area;
a first contact electrode on the first electrode in the contact area and in contact with a first end of the first light-emitting element;
a second contact electrode comprising a first area and a second area, wherein the first area is on the second electrode pattern in the contact area and is in contact with a second end of the first light-emitting element, and wherein the second area extends from the first area and is in the line area; and
a first pattern on the second area in the line area,
wherein the first pattern comprises a same material as the first contact electrode.

### Claim 2 (depends on 1)

The display device of claim 1, wherein the first pattern is in physical contact with the second area.

### Claim 3 (depends on 1)

The display device of claim 1, further comprising a second light-emitting element between the second electrode and the first electrode pattern in the contact area.

### Claim 4 (depends on 3)

The display device of claim 3, further comprising a third contact electrode on the second electrode in the contact area and in contact with a first end of the second light-emitting element,
wherein the second contact electrode further comprises a third area that extends from the second area to be on the first electrode pattern in the contact area, and is in contact with a second end of the second light-emitting element.

### Claim 5 (depends on 4)

The display device of claim 4, wherein the third contact electrode comprises a same material as the first contact electrode.

### Claim 6 (depends on 1)

The display device of claim 1, further comprising an insulating layer on the second contact electrode,
wherein the insulating layer exposes at least a part of the second area in the line area, and covers the first area in the contact area.

### Claim 7 (depends on 6)

The display device of claim 6, wherein the first pattern is in physical contact with the second area exposed by the insulating layer.

### Claim 8 (depends on 7)

The display device of claim 7, wherein an upper surface of the second area is in direct contact with a lower surface of the first pattern.

### Claim 9 (depends on 1)

The display device of claim 1, further comprising an insulating layer on the second contact electrode,
wherein the insulating layer is between the second area and the first pattern in the line area, and comprises a plurality of contact holes that penetrate through the insulating layer to expose a part of the second area.

### Claim 10 (depends on 9)

The display device of claim 9, wherein the first pattern is in direct contact with the second area through the plurality of contact holes that penetrate through the insulating layer.

### Claim 11 (depends on 1)

The display device of claim 1, wherein a thickness of the first contact electrode, a thickness of the second contact electrode, and a thickness of the first pattern are each in a range of 150 Å to 1,000 Å.

### Claim 12

A display device comprising:
a substrate;
an electrode layer on the substrate and comprising a first electrode, a first electrode pattern spaced apart from the first electrode, a second electrode between the first electrode and the first electrode pattern, and a second electrode pattern between the first electrode and the second electrode;
a plurality of light-emitting elements on the electrode layer and comprising a first light-emitting element and a second light-emitting element, wherein both ends of the first light-emitting element are on the first electrode and the second electrode pattern, respectively, and wherein both ends of the second light-emitting element are on the second electrode and the first electrode pattern, respectively;
a first contact electrode on the first electrode to overlap the first electrode and in contact with a first end of the first light-emitting element;
a second contact electrode on the second electrode to overlap the second electrode and in contact with a first end of the second light-emitting element;
a third contact electrode on the electrode layer and comprising a first area, a second area, and a third area, wherein the first area overlaps the second electrode pattern and is in contact with a second end of the first light-emitting element, the second area overlaps the first electrode pattern and is in contact with a second end of the second light-emitting element, and the third area couples the first area with the second area;
an insulating layer on the third contact electrode; and
a first pattern on the third area,
wherein the insulating layer covers the first area and the second area and exposes at least a part of the third area.

### Claim 13 (depends on 12)

The display device of claim 12, wherein the first pattern is in physical contact with the third area exposed by the insulating layer.

### Claim 14 (depends on 13)

The display device of claim 13, wherein the third contact electrode comprises crystalline indium tin oxide (ITO), and
wherein the first pattern comprises crystalline ITO and/or amorphous ITO.