# US 2021/0242381 A1 · Display device and method of manufacturing the same

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- Number: US 2021/0242381 A1
- Document ID: US20210242381A1
- Status: Published application
- Kind: A1
- Application number: 17/153,694
- Filed: 2021-01-20
- Published: 2021-08-05
- Earliest claimed: 2020-01-30
- Assignees: Samsung Display Co., Ltd.
- Applicants: Samsung Display Co., Ltd.
- Inventors: Hyun Wook LEE; Sung Jin LEE; Jong Chan LEE; Tae Hee LEE
- Web page: https://patentgrep.com/patent/US20210242381A1

## CPC

- H10H 20/857: Interconnections, e.g. lead-frames, bond wires or solder balls
- H10W 90/00: Package configurations
- H10H 20/0364: {of interconnections}
- H10W 90/732: {between stacked chips}
- H10W 90/734: {between a chip and a stacked insulating package substrate, interposer or RDL}
- H10H: INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS
- H10W: GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10

## Abstract

A display device includes a substrate; a first electrode and a second electrode on the substrate and spaced from each other at a first distance along a first direction; a third electrode and a fourth electrode on the first electrode and the second electrode, respectively, and spaced from each other at a second distance along the first direction; a first insulating layer on the third electrode and the fourth electrode; and a light emitting element located on the first insulating layer and between the third electrode and the fourth electrode in a plan view, and the second distance is greater than the first distance.

## Claims

### Claim 1

A display device comprising:
a substrate;
a first electrode and a second electrode on the substrate and spaced from each other at a first distance along a first direction;
a third electrode and a fourth electrode on the first electrode and the second electrode, respectively, and spaced from each other at a second distance along the first direction; and
a light emitting element located between the third electrode and the fourth electrode in a plan view,
wherein the second distance is greater than the first distance.

### Claim 2 (depends on 1)

The display device of claim 1, wherein a length of the light emitting element in the first direction is greater than the first distance and less than the second distance, and
wherein at least a portion of the first electrode and at least a portion of the second electrode overlap the light emitting element.

### Claim 3 (depends on 1)

The display device of claim 1, wherein the first electrode and the second electrode comprise the same material, and
wherein the third electrode and the fourth electrode comprise a material different from the first electrode and the second electrode.

### Claim 4 (depends on 3)

The display device of claim 3, wherein the first electrode and the second electrode comprise at least one of indium tin oxide (ITO), indium zinc oxide (IZO), zinc oxide (ZnO), and indium tin zinc oxide (ITZO).

### Claim 5 (depends on 3)

The display device of claim 3, wherein the third electrode and the fourth electrode comprise at least one of Ag, Mg, Al, Pt, Pd, Au, Ni, Nd, Ir, Cr, Li, Ca, LiF/Ca, LiF/Al, Mo, Ti, and Cu.

### Claim 6 (depends on 1)

The display device of claim 1, wherein the third electrode contacts the first electrode, and the fourth electrode contacts the second electrode.

### Claim 7 (depends on 1)

The display device of claim 1, further comprising:
a first insulating layer on the third electrode and the fourth electrode,
wherein the light emitting element is on the first insulating layer.

### Claim 8 (depends on 7)

The display device of claim 7, further comprising:
a first insulating pattern and a second insulating pattern on the first insulating layer and spaced from each other along the first direction,
wherein the light emitting element is between the first insulating pattern and the second insulating pattern.

### Claim 9 (depends on 7)

The display device of claim 7, further comprising:
a fifth electrode contacting the first electrode and a first end of the light emitting element; and
a sixth electrode contacting the second electrode and a second end of the light emitting element.

### Claim 10 (depends on 9)

The display device of claim 9, wherein the fifth electrode and the sixth electrode are on the first insulating layer,
wherein the first insulating layer and the third electrode comprise a first opening exposing at least a portion of the first electrode,
wherein the first insulating layer and the fourth electrode comprise a second opening exposing at least a portion of the second electrode,
wherein the fifth electrode is connected to the first electrode through the first opening, and
wherein the sixth electrode is connected to the second electrode through the second opening.

### Claim 11 (depends on 9)

The display device of claim 9, further comprising:
an anchoring layer on the light emitting element,
wherein the anchoring layer contacts at least a portion of an outer peripheral surface of the light emitting element, and exposes the first end and the second end of the light emitting element.

### Claim 12 (depends on 1)

The display device of claim 1, further comprising:
a first bank between the first electrode and the substrate and overlapping the first electrode and the third electrode; and
a second bank between the second electrode and the substrate and overlapping the second electrode and the fourth electrode.

### Claim 13 (depends on 10)

The display device of claim 10, further comprising:
a first bank and a second bank on the first insulating layer and each having a shape protruding in a display direction of the light emitting element,
wherein the first opening is positioned between the first bank and the light emitting element, and
wherein the second opening is positioned between the second bank and the light emitting element.

### Claim 14

A method of manufacturing a display device, the method comprising:
sequentially forming a first conductive layer and a second conductive layer on a substrate;
etching the first conductive layer to form a first electrode and a second electrode spaced from each other at a first distance along a first direction, and etching the second conductive layer to form a third electrode and a fourth electrode spaced from each other at a second distance along the first direction;
forming an insulating layer on the third electrode and the fourth electrode; and
aligning a light emitting element on the insulating layer,
wherein the second distance is greater than the first distance, and
wherein the light emitting element is aligned between the third electrode and the fourth electrode in a plan view.

### Claim 15 (depends on 14)

The method of claim 14, wherein a length of the light emitting element in the first direction is greater than the first distance and less than the second distance, and
wherein at least a portion of the first electrode and at least a portion of the second electrode overlap the light emitting element.

### Claim 16 (depends on 15)

The method of claim 15, wherein the forming the first to fourth electrodes comprises:
etching the first conductive layer and the second conductive layer;
crystallizing the first electrode and the second electrode by performing a bake process for heating the substrate; and
forming the third electrode and the fourth electrode by additionally etching an etched second conductive layer.

### Claim 17 (depends on 14)

The method of claim 14, further comprising:
forming a first opening in the third electrode and the insulating layer; and
forming a second opening in the fourth electrode and the insulating layer.

### Claim 18 (depends on 17)

The method of claim 17, further comprising:
forming a fifth electrode and a sixth electrode on the insulating layer,
wherein the forming the fifth electrode and the sixth electrode comprises:
contacting the fifth electrode with the first electrode through the first opening; and
contacting the sixth electrode with the second electrode through the second opening.

### Claim 19 (depends on 17)

The method of claim 17, further comprising:
forming a first bank and a second bank each having a shape protruding in a display direction of the light emitting element on the insulating layer,
wherein the first opening is positioned between the first bank and the light emitting element, and
wherein the second opening is positioned between the second bank and the light emitting element.

### Claim 20 (depends on 14)

The method of claim 14, wherein the forming the insulating layer further comprises:
forming a first insulating pattern and a second insulating pattern spaced from each other along the first direction on the insulating layer, and
wherein the light emitting element is between the first insulating pattern and the second insulating pattern.

### Claim 21

A display device comprising:
a substrate;
a first electrode and a second electrode on the substrate;
a third electrode on the first electrode and having a first opening exposing at least a portion of the first electrode;
a fourth electrode on the second electrode and having a second opening exposing at least a portion of the second electrode;
a light emitting element located between the third electrode and the fourth electrode when viewed on a plan and capable of emitting light in a display direction;
a fifth electrode having at least a portion electrically connected to one end of the light emitting element, I the fifth electrode being on the third electrode; and
a sixth electrode having at least a portion electrically connected to the other end of the light emitting element, the sixth electrode being on the fourth electrode,
wherein the fifth electrode is connected to the first electrode through the first opening, and
wherein the sixth electrode is connected to the second electrode through the second opening.

### Claim 22 (depends on 21)

The display device of claim 21, wherein the first electrode and the fifth electrode comprise a first material, and
wherein the second electrode and the sixth electrode comprise a second material.

### Claim 23 (depends on 22)

The display device of claim 22, wherein the first material and the second material comprise at least one of indium tin oxide (ITO), indium zinc oxide (IZO), zinc oxide (ZnO), and indium tin zinc oxide (ITZO).

### Claim 24 (depends on 21)

The display device of claim 21, further comprising:
an emission region through which light can be emitted;
a non-emission region that is a region other than the emission region; and
a partition wall having a shape protruding in the display direction and defining the emission region,
wherein the first opening and the second opening are in the non-emission region.

### Claim 25 (depends on 24)

The display device of claim 24, wherein the first opening and the second opening overlap the partition wall.

### Claim 26 (depends on 24)

The display device of claim 24, wherein the non-emission region comprises a region in which at least a portion of the first electrode or the second electrode is cut.

### Claim 27 (depends on 24)

The display device of claim 24, further comprising:
a bank arranged in the emission region and having a shape protruding in the display direction,
wherein at least a portion of each of the first electrode and the second electrode is positioned on the bank, and
wherein the first opening and the second opening do not overlap the bank.