Display device and method of fabricating the same

Patent metadata

Field	Value
Publication number	US-12489098-B2
Application number	US-202217735294-A
Country	US
Kind code	B2
Filing date	May 3, 2022
Priority date	Aug 19, 2021
Publication date	Dec 2, 2025
Grant date	Dec 2, 2025

Abstract

A display device includes a first electrode and a second electrode, a first insulating layer covering the first electrode and the second electrode, light emitting elements disposed on the first insulating layer, a first connection electrode disposed on the first electrode and contacting an end of each of the light emitting elements, a second connection electrode spaced apart from the first connection electrode and disposed on the second electrode and contacting another end of each of the light emitting elements, a second insulating layer disposed on the first insulating layer and at least partially covering the first connection electrode and the second connection electrode, and a third insulating layer disposed on part of the second insulating layer, wherein the second insulating layer comprises an opening overlapping a part between the first connection electrode and the second connection electrode spaced apart from each other.

First claim

What is claimed is:

1 . A display device comprising:
a first electrode and a second electrode spaced apart from each other on a substrate; a first insulating layer disposed on the substrate and covering the first electrode and the second electrode; light emitting elements disposed on the first insulating layer and having ends disposed on the first electrode and the second electrode; a first connection electrode disposed on the first electrode and electrically contacting an end of each of the light emitting elements; a second connection electrode spaced apart from the first connection electrode, disposed on the second electrode, and electrically contacting another end of each of the light emitting elements; a second insulating layer disposed on the first insulating layer and at least partially covering the first connection electrode and the second connection electrode; and a third insulating layer disposed on part of the second insulating layer and comprising openings exposing other parts of the second insulating layer, wherein the second insulating layer comprises an opening overlapping in a plan view a part between the first connection electrode and the second connection electrode, wherein a width of the opening of the second insulating layer is greater than a distance between the first connection electrode and the second connection electrode, and wherein the third insulating layer covers areas of the first connection electrode and the second connection electrode exposed by the second insulating layer in the opening and side surfaces of the third insulating layer align with side surfaces of the first connection electrode and the second connection electrode in the opening.

2 . The display device of claim 1 , wherein
the opening of the second insulating layer overlaps in the plan view a side of the first connection electrode and a side of the second connection electrode that face each other.

3 . The display device of claim 2 , wherein
the opening of the second insulating layer overlaps the light emitting elements in the plan view, and the width of the opening of the second insulating layer is smaller than a length of each of the light emitting elements.

4 . The display device of claim 1 , wherein
the first connection electrode electrically contacts the first electrode through a first contact part penetrating the first insulating layer, and the second connection electrode electrically contacts the second electrode through a second contact part penetrating the first insulating layer.

5 . The display device of claim 1 , wherein
a center of the opening of the second insulating layer is side by side with a center of each of the light emitting elements, the first connection electrode directly contacts end surfaces and part of a side surface of each of the light emitting elements, and the second connection electrode directly contacts end surfaces and part of a side surface of each of the light emitting elements.

6 . The display device of claim 1 , wherein
a center of the opening of the second insulating layer is not side by side with a center of each of the light emitting elements, the first connection electrode electrically contacts an end surface of each of the light emitting elements, and the second connection electrode directly contacts another end surface and part of a side surface of each of the light emitting elements.

7 . The display device of claim 1 , wherein the third insulating layer comprises a first insulating pattern disposed on inner sidewalls of the opening of the second insulating layer.

8 . The display device of claim 7 , wherein a side of the first connection electrode which electrically contacts the light emitting elements and a side of the second connection electrode which electrically contacts the light emitting elements are side by side with sidewalls of the first insulating pattern, respectively.

9 . The display device of claim 1 , further comprising:
a first bank pattern disposed between the first electrode and the substrate; and a second bank pattern disposed between the second electrode and the substrate, wherein the first connection electrode overlaps the first bank pattern in the plan view, and the second connection electrode overlaps the second bank pattern in the plan view.

10 . The display device of claim 9 , wherein the light emitting elements are disposed between the first bank pattern and the second bank pattern.

11 . The display device of claim 9 , wherein
the third insulating layer comprises second insulating patterns overlapping corresponding sidewalls of the first bank pattern and the second bank pattern in directions perpendicular to the corresponding sidewalls of the first bank pattern and the second bank pattern, and the second insulating patterns are disposed on the second insulating layer.

12 . The display device of claim 1 , wherein
the first electrode and the second electrode extend in a first direction and are spaced apart from each other in a second direction different from the first direction, the light emitting elements are arranged in the first direction, and the opening of the second insulating layer extends in the first direction.

13 . The display device of claim 12 , further comprising:
a bank layer extending in the first direction and the second direction on the first insulating layer and surrounding a part where the light emitting elements are disposed, wherein each of the first connection electrode and the second connection electrode extends in the first direction such that part of the first connection electrode and part of the second connection electrode are disposed on the bank layer.

14 . The display device of claim 1 , further comprising:
a first bank pattern disposed between the first electrode and the substrate; and a second bank pattern disposed between the second electrode and the substrate, wherein the other parts of the second insulating layer comprise:
a first other part overlapping the first bank pattern in a thickness direction of the substrate; and
a second other part overlapping the second bank pattern in the thickness direction, the second other part being spaced apart from the first other part, and
the openings in the third insulating layer comprise:
a first opening overlapping the first other part in the thickness direction; and
a second opening overlapping the second other part in the thickness direction.

15 . The display device of claim 14 , wherein
the first other part at least partially covers at least one end of the first connection electrode, and the second other part at least partially covers at least one end of the second connection electrode.

16 . An electronic device comprising:
a display device, the display device comprising:
a first bank pattern disposed on a surface of a substrate;
a second bank pattern disposed on the surface and spaced apart from the first bank pattern;
a first electrode at least partially overlapping the first bank pattern in a direction orthogonal to the surface;
a second electrode spaced apart from the first electrode and at least partially overlapping the second bank pattern in the direction;
a first insulating layer disposed on the surface, the first insulating layer covering the first electrode and the second electrode;
light emitting elements disposed on the first insulating layer between the first bank pattern and the second bank pattern, the light emitting elements having corresponding first ends and corresponding second ends respectively opposing the corresponding first ends;
a

Assignees

• Samsung Display Co Ltd

Inventors

• Bae Su Bin
• Yeo Yun Jong
• Jung Da Woon
• Jeong Yu Gwang

Classifications

• H10W90/22

  the stacked chips being on both top and bottom sides of a package substrate, interposer or RDL · CPC title

• H10W70/654

  Top-view layouts · CPC title

• H10W70/093

  Connecting or disconnecting other interconnections thereto or therefrom, e.g. connecting bond wires or bumps · CPC title

• H10W70/60

  Insulating or insulated package substrates; Interposers; Redistribution layers (leadframes H10W70/40) · CPC title

• H10W90/00 Primary

  Package configurations · CPC title