Display device and method of manufacturing the same

Patent metadata

Field	Value
Publication number	US-12101969-B2
Application number	US-202217649910-A
Country	US
Kind code	B2
Filing date	Feb 3, 2022
Priority date	Jun 16, 2021
Publication date	Sep 24, 2024
Grant date	Sep 24, 2024

Abstract

A display device includes: a substrate; an organic insulating layer on the substrate and having an opening; a first electrode on the organic insulating layer; an auxiliary electrode on the organic insulating layer and including a first portion overlapping the opening; a bank layer having a first bank opening overlapping the first electrode and a second bank opening overlapping the first portion; an intermediate layer on the first electrode and the auxiliary electrode, the intermediate layer including a hole exposing a portion of the auxiliary electrode; and a second electrode on the intermediate layer, overlapping the first electrode and the auxiliary electrode, and in contact with the auxiliary electrode through the hole in the intermediate layer. The hole in the intermediate layer only partially overlaps the opening in the organic insulating layer and is located within the second bank opening in a plan view.

First claim

What is claimed is:

1. A display device comprising:
a substrate;
an organic insulating layer on the substrate and having an opening;
a first electrode on the organic insulating layer;
an auxiliary electrode on the organic insulating layer and comprising a first portion overlapping the opening in the organic insulating layer;
a bank layer having a first bank opening overlapping the first electrode and a second bank opening overlapping the first portion;
an intermediate layer on the first electrode and the auxiliary electrode, the intermediate layer having a hole exposing a portion of the auxiliary electrode; and
a second electrode on the intermediate layer, overlapping the first electrode and the auxiliary electrode, and in contact with the auxiliary electrode through the hole in the intermediate layer,
wherein the hole in the intermediate layer only partially overlaps the opening in the organic insulating layer and is located within the second bank opening in a plan view.

2. The display device of claim 1 , wherein, in a plan view, a portion of the hole in the intermediate layer is located in the opening in the organic insulating layer, and a remaining portion of the hole in the intermediate layer is located between a contour line of the opening in the organic insulating layer and a contour line of the second bank opening.

3. The display device of claim 1 , wherein the organic insulating layer comprises an inclined surface adjacent to the opening, and
a portion of a contact area between the second electrode and the auxiliary electrode is located on the inclined surface of the organic insulating layer.

4. The display device of claim 1 , wherein a center of the hole in the intermediate layer is located within the opening in the organic insulating layer in a plan view.

5. The display device of claim 4 , wherein the center of the hole in the intermediate layer is spaced by about 1 μm or greater from an inner edge of the organic insulating layer that defines the opening in the organic insulating layer.

6. The display device of claim 1 , further comprising:
a common voltage line on the substrate and extending in a direction; and
an auxiliary common voltage line overlapping the common voltage line and electrically connected to the common voltage line through a contact hole defined in at least one insulating layer arranged between the auxiliary common voltage line and the common voltage line,
wherein the auxiliary common voltage line and the common voltage line overlap the opening in the organic insulating layer.

7. The display device of claim 6 , further comprising an inorganic insulating layer in direct contact with an upper surface of the auxiliary common voltage line.

8. The display device of claim 7 , wherein the first portion of the auxiliary electrode overlapping the opening in the organic insulating layer has a width greater than a width of the opening in the organic insulating layer,
wherein the auxiliary electrode comprises a second portion that is integrally provided as a single body with the first portion and has a width less than a width of the first portion, and
wherein the second portion of the auxiliary electrode is electrically connected to the auxiliary common voltage line through a contact hole that penetrates through the organic insulating layer and the inorganic insulating layer.

9. The display device of claim 1 , wherein the intermediate layer comprises an emission layer, and
wherein the hole in the intermediate layer comprises a hole penetrating through the emission layer.

10. A method of manufacturing a display device, the method comprising:
providing, on a substrate, an organic insulating layer having an opening;
providing a first electrode on the organic insulating layer;
providing, on the organic insulating layer, an auxiliary electrode comprising a first portion overlapping the opening of the organic insulating layer;
providing a bank layer having a first bank opening overlapping the first electrode and a second bank opening overlapping the first portion of the auxiliary electrode;
providing an intermediate layer on the first electrode and the auxiliary electrode;
providing, in the intermediate layer, a hole that exposes a portion of the auxiliary electrode; and
providing a second electrode on the intermediate layer so that the second electrode is in contact with the auxiliary electrode through the hole in the intermediate layer,
wherein the hole in the intermediate layer only partially overlaps the opening in the organic insulating layer and is located within the second bank opening in a plan view.

11. The method of claim 10 , wherein the providing the hole comprises irradiating a laser beam on the intermediate layer, and
wherein a portion of the laser beam is located between a contour line of the opening in the organic insulating layer and a contour line of the second bank opening in a plan view.

12. The method of claim 11 , wherein a center of the laser beam is located within the second bank opening.

13. The method of claim 10 , wherein a center of the hole in the intermediate layer is spaced by about 1 μm or greater from an inner edge of the organic insulating layer that defines the opening in the organic insulating layer.

14. The method of claim 10 , wherein the organic insulating layer comprises an inclined surface adjacent to the opening, and
wherein, in the providing the second electrode, a portion of a contact area between the second electrode and the auxiliary electrode is located on the inclined surface of the organic insulating layer.

15. The method of claim 10 , wherein the first portion of the auxiliary electrode overlapping the opening in the organic insulating layer has a width greater than a width of the opening in the organic insulating layer,
wherein the auxiliary electrode comprises a second portion that is integrally provided as a single body with the first portion and has a width less than a width of the first portion.

16. The method of claim 15 , further comprising:
providing a common voltage line that is arranged on the substrate and extends in a direction; and
providing an auxiliary common voltage line that overlaps the common voltage line and is electrically connected to the common voltage line through a contact hole defined in at least one insulating layer arranged between the auxiliary common voltage line and the common voltage line,
wherein the auxiliary common voltage line and the common voltage line overlap the opening in the organic insulating layer.

17. The method of claim 16 , further comprising providing an inorganic insulating layer on the auxiliary common voltage line.

18. The method of claim 17 , further comprising providing a contact hole that penetrates through the organic insulating layer and the inorganic insulating layer to electrically connect the second portion of the auxiliary electrode to the auxiliary common voltage line.

19. The method of claim 10 , wherein, in a plan view, a portion of a contour line of the opening in the organic insulating layer overlaps the hole in the intermediate layer.

20. The method of claim 10 , wherein the providing the intermediate layer comprises providing an emission layer that overlaps the first electrode and the auxiliary electrode, and
wherein the providing the hole comprises providing a hole that penetrates through the emission layer.

Assignees

• Samsung Display Co Ltd

Inventors

• Lee Seho
• Kim Taehyung
• Yoon Jihwan
• Lee Hojun
• Pyo Sangwoo
• Hwang Jaehoon

Classifications

• H10K59/1315

  comprising structures specially adapted for lowering the resistance · CPC title

• H10K59/80522

  combined with auxiliary electrodes · CPC title

• H10K71/00

  Manufacture or treatment specially adapted for the organic devices covered by this subclass · CPC title

• H10K59/131 Primary

  Interconnections, e.g. wiring lines or terminals · CPC title

• H10K59/124

  Insulating layers formed between TFT elements and OLED elements · CPC title