IP Library Granted Patent US 12713749
Granted Patent B2
US 12713749 · App. 18/362,628 · Granted Aug 18, 2026

Display device

Inventors: Jang Soon Park (Yongin-si, KR); Hyun Wook Lee (Yongin-si, KR); Sung Geun Bae (Yongin-si, KR)
Assignee: Samsung Display Co., Ltd.
H10H20/857H10H20/819H10H20/0364H10W90/00
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Quick Facts
Patent No.
US 12713749
App. No.
18/362,628
Granted
Aug 18, 2026
Kind
B2
Abstract

A display device includes a substrate, a via layer above the substrate, and including a protrusion, an insulating pattern above the protrusion, and having a width that is greater than a width of the protrusion, first and second electrodes above the via layer, and spaced apart from each other with the protrusion and the insulating pattern therebetween, a first insulating layer above the protrusion, the insulating pattern, the first electrode, and the second electrode, a light-emitting element above the first insulating layer, and between the first electrode and the second electrode, a first connection electrode connected to a first end of the light-emitting element, and a second connection electrode connected to a second end of the light-emitting element.

Claims (49)

1 . A display device comprising:

a substrate;

a via layer above the substrate, and comprising a protrusion;

an insulating pattern above the protrusion, and having a width that is greater than a width of the protrusion;

first and second electrodes above the via layer, and spaced apart from each other with the protrusion and the insulating pattern therebetween;

a first insulating layer above the protrusion, the insulating pattern, the first electrode, and the second electrode, and covering side surfaces of the protrusion and the insulating pattern;

a light-emitting element above the first insulating layer, and between the first electrode and the second electrode;

a first connection electrode connected to a first end of the light-emitting element; and

a second connection electrode connected to a second end of the light-emitting element.

2 . The display device of claim 1 , wherein the protrusion and the via layer are integral, and

wherein the protrusion protrudes toward the light-emitting element.

3 . The display device of claim 1 , wherein the protrusion and the insulating pattern overlap the light-emitting element.

4 . The display device of claim 1 , wherein one of the side surfaces of the insulating pattern protrudes outwardly more than one of the side surfaces of the protrusion.

5 . The display device of claim 4 , wherein the width of the protrusion and the width of the insulating pattern are less than a distance between the first electrode and the second electrode.

6 . The display device of claim 1 , wherein a thickness of the protrusion and a thickness of the insulating pattern are less than a thickness of the first electrode or the second electrode.

7 . The display device of claim 1 , wherein a sum of a thickness of the protrusion and a thickness of the insulating pattern is equal to a thickness of the first electrode or the second electrode.

8 . The display device of claim 1 , wherein one of the side surfaces of the protrusion is perpendicular to a surface of the via layer.

9 . The display device of claim 1 , wherein one of the side surfaces of the protrusion is inclined, and

wherein a width of an upper surface of the protrusion is less than a width of a lower surface of the protrusion.

10 . The display device of claim 1 , wherein the first insulating layer is in contact with a lower surface of the light-emitting element where the insulating pattern and the light-emitting element overlap each other.

11 . A display device comprising:

a substrate;

a via layer above the substrate, and comprising a protrusion;

first and second electrodes above the via layer, and spaced apart from each other with the protrusion therebetween;

a first insulating layer above the protrusion, the first electrode, and the second electrode;

a light-emitting element above the first insulating layer, and between the first electrode and the second electrode;

a first connection electrode connected to a first end of the light-emitting element; and

a second connection electrode connected to a second end of the light-emitting element,

wherein a thickness of the protrusion is equal to a thickness of the first electrode or the second electrode.

12 . The display device of claim 11 , wherein the protrusion and the via layer are integral, and

wherein the protrusion protrudes toward the light-emitting element.

13 . The display device of claim 11 , wherein an upper surface of the protrusion is in contact with the first insulating layer, and

wherein the first insulating layer is in contact with a lower surface of the light-emitting element.

14 . The display device of claim 11 , wherein a width of the protrusion is less than a distance between the first electrode and the second electrode.

15 . The display device of claim 11 , further comprising a second insulating layer above the light-emitting element,

wherein the first connection electrode and the second connection electrode are spaced apart from each other with the second insulating layer therebetween.

16 . A method of fabricating a display device, the method comprising:

forming a via layer above a substrate;

forming an insulating pattern above the via layer;

forming a protrusion under the insulating pattern by etching the via layer;

forming first and second electrodes spaced apart from each other above the via layer;

forming a first insulating layer above the insulating pattern, the first electrode, and the second electrode;

aligning a light-emitting element above the first insulating layer between the first electrode and the second electrode;

forming a first connection electrode connected to a first end of the light-emitting element; and

forming a second connection electrode connected to a second end of the light-emitting element.

17 . The method of claim 16 , wherein the forming the protrusion comprises reducing a thickness of the via layer by using the insulating pattern as a hard mask.

18 . The method of claim 16 , wherein the protrusion is over-etched underneath the insulating pattern to be formed in an under-cut shape.

19 . The method of claim 16 , wherein a sum of a thickness of the protrusion and a thickness of the insulating pattern is equal to a thickness of the first electrode or the second electrode.

20 . The method of claim 16 , wherein the first insulating layer is in contact with a lower surface of the light-emitting element.