# US 12,218,113 B2 · Display device and method of manufacturing the same

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- Number: US 12,218,113 B2
- Document ID: US12218113B2
- Status: Granted
- Kind: B2
- Application number: 17/445,686
- Filed: 2021-08-23
- Published: 2022-03-10
- Granted: 2025-02-04
- Earliest claimed: 2020-09-07
- Assignees: Samsung Display Co., Ltd.
- Applicants: Samsung Display Co., Ltd.
- Inventors: In Kyung Yoo; Hee Na Kim; Chong Sup Chang; Cha Dong Kim; Sang Jin Lee
- Web page: https://patentgrep.com/patent/US12218113B2

## CPC

- H10W 72/0198: {batch processes}
- H10W 90/00: Package configurations
- H10H 20/857: Interconnections, e.g. lead-frames, bond wires or solder balls
- H10H 29/012: {of active-matrix LED displays}
- H10H 29/03: using mass transfer of LEDs, e.g. by using liquid suspensions
- 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 includes a substrate, a data conductive layer on the substrate and including a first voltage line, a via layer on the data conductive layer, a light emitting element on the via layer, a first contact electrode on the light emitting element and contacting a first end of the light emitting element, and a second contact electrode on the light emitting element and contacting a second end of the light emitting element, wherein the second contact electrode is electrically connected to the first voltage line through a first contact hole penetrating the via layer.

## Claims

### Claim 1

A display device, comprising:
a substrate;
a data conductive layer on the substrate and comprising a first voltage line;
a via layer on the data conductive layer;
a light emitting element on the via layer;
a first contact electrode on the light emitting element and contacting a first end of the light emitting element; and
a second contact electrode on the light emitting element and contacting a second end of the light emitting element,
wherein the second contact electrode is electrically coupled to the first voltage line through a first contact hole penetrating the via layer, and
wherein the second contact electrode is in direct physical contact with the first voltage line.

### Claim 2 (depends on 1)

The display device of claim 1, further comprising:
a transistor between the substrate and the data conductive layer,
wherein the first contact electrode is electrically coupled to the transistor.

### Claim 3

A display device, comprising:
a substrate;
a data conductive layer on the substrate and comprising a first voltage line;
a via layer on the data conductive layer;
a light emitting element on the via layer;
a first contact electrode on the light emitting element and contacting a first end of the light emitting element;
a second contact electrode on the light emitting element and contacting a second end of the light emitting element, and
a transistor between the substrate and the data conductive layer,
wherein the second contact electrode is electrically coupled to the first voltage line through a first contact hole penetrating the via layer,
wherein the first contact electrode is electrically coupled to the transistor,
wherein the data conductive layer further comprises a first conductive pattern electrically coupled to a first electrode of the transistor, and
wherein the first contact electrode is electrically coupled to the first conductive pattern through a second contact hole penetrating the via layer.

### Claim 4 (depends on 3)

The display device of claim 3,
wherein the first contact electrode is in direct contact with the first conductive pattern.

### Claim 5 (depends on 1)

The display device of claim 1,
wherein the light emitting element is on one surface of the via layer.

### Claim 6 (depends on 5)

The display device of claim 5,
wherein the first contact electrode and the second contact electrode are on one surface of the via layer exposed by the light emitting element.

### Claim 7 (depends on 1)

The display device of claim 1, further comprising:
a first insulating layer on the light emitting element,
wherein the first contact electrode and the second contact electrode are on the first insulating layer.

### Claim 8 (depends on 1)

The display device of claim 1,
wherein the data conductive layer comprises an alignment mark.

### Claim 9

A display device, comprising:
a substrate;
a data conductive layer on the substrate and comprising a first voltage line;
a via layer on the data conductive layer;
a light emitting element on the via layer;
a first contact electrode on the light emitting element and contacting a first end of the light emitting element;
a second contact electrode on the light emitting element and contacting a second end of the light emitting element, and
a bank on the via layer,
wherein the second contact electrode is electrically coupled to the first voltage line through a first contact hole penetrating the via layer, and
wherein the bank does not overlap the light emitting element in a thickness direction of the substrate, and the first contact electrode and the second contact electrode are on the bank.

### Claim 10 (depends on 9)

The display device of claim 9,
wherein the first contact electrode and the second contact electrode are directly on a side surface of the bank.

### Claim 11

A display device, comprising:
a substrate;
a data conductive layer on the substrate and comprising a first voltage line;
a via layer on the data conductive layer;
a light emitting element on the via layer;
a first contact electrode on the light emitting element and contacting a first end of the light emitting element; and
a second contact electrode on the light emitting element and contacting a second end of the light emitting element,
wherein the second contact electrode is electrically coupled to the first voltage line through a first contact hole penetrating the via layer, and
wherein the via layer comprises a first region having a first thickness and a second region having a second thickness greater than the first thickness, and the light emitting element is on the first region of the via layer.

### Claim 12 (depends on 11)

The display device of claim 11,
wherein the second region of the via layer does not overlap the light emitting element in a thickness direction of the substrate, and a side surface of the second region of the via layer and one end selected from the first end and the second end of the light emitting element face each other.

### Claim 13 (depends on 12)

The display device of claim 12,
wherein the first contact electrode and the second contact electrode are on the second region of the via layer exposed by the light emitting element.

### Claim 14 (depends on 1)

The display device of claim 1,
wherein one surface of the via layer comprises a groove in which the one surface of the via layer is recessed in a thickness direction of the via layer.

### Claim 15 (depends on 14)

The display device of claim 14,
wherein the light emitting element is in the groove.