Display device comprising a connection electrode disposed on an organic insulating layer and a portion of which is disposed in a contact hole

Patent metadata

Field	Value
Publication number	US-12364112-B2
Application number	US-202217721696-A
Country	US
Kind code	B2
Filing date	Apr 15, 2022
Priority date	Aug 23, 2021
Publication date	Jul 15, 2025
Grant date	Jul 15, 2025

Abstract

Provided is a display device. The display device comprises a base layer, a circuit layer on the base layer, and a light emitting element on the circuit layer, wherein the circuit layer includes at least one organic insulating layer in which a contact hole is defined, and a connection electrode disposed on the at least one organic insulating layer, a portion of which is disposed in the contact hole, wherein a minimum value of a width in one direction of the contact hole is about 1.8 micrometers or more and less than about 2.5 micrometers, and wherein an upper width of the connection electrode in the one direction is about 3.6 micrometers or more and less than about 6 micrometers.

First claim

What is claimed is:

1. A display device comprising:
a base layer;
a circuit layer disposed on the base layer; and
a light emitting element disposed on the circuit layer,
wherein the circuit layer includes at least one organic insulating layer in which a contact hole is defined; and
a connection electrode disposed on the at least one organic insulating layer, a portion of which is disposed in the contact hole,
wherein a minimum value of a width in one direction of the contact hole is about 1.8 micrometers or more and less than about 2.5 micrometers,
wherein an upper width of the connection electrode in the one direction is about 3.6 micrometers or more and less than about 6 micrometers,
wherein the circuit layer includes:
a transistor disposed between the at least one organic insulating layer and the base layer; and
a lower connection electrode connected to the transistor and electrically connected to the connection electrode and,
wherein an upper width of the lower connection electrode in the one direction is substantially equal to an upper width of the connection electrode in the one direction.

2. The display device of claim 1 , wherein the at least one organic insulating layer includes:
a first organic insulating layer disposed on the transistor; and
a second organic insulating layer disposed on the first organic insulating layer,
wherein a first contact hole is defined in the first organic insulating layer, and
wherein a minimum value of a width of the first contact hole in the one direction is about 1.8 micrometers or more and less than about 2.5 micrometers.

3. The display device of claim 2 , wherein the connection electrode includes a first connection electrode disposed in the first contact hole, and
wherein an upper width of the first connection electrode in the one direction is about 3.6 micrometers or more and less than about 6 micrometers.

4. The display device of claim 3 , wherein a second contact hole is defined in the second organic insulating layer,
wherein the connection electrode further includes a second connection electrode disposed in the second contact hole and electrically connected to the first connection electrode,
wherein a minimum value of a width of the second contact hole in the one direction is about 1.8 micrometers or more and less than about 2.5 micrometers, and
wherein an upper width of the second connection electrode in the one direction is about 3.6 micrometers or more and less than about 6 micrometers.

5. The display device of claim 1 , wherein the circuit layer includes at least one inorganic insulating layer disposed between the base layer and the organic insulating layer,
wherein a lower contact hole is defined in the at least one inorganic insulating layer, and
wherein the lower connection electrode is connected to the transistor through the lower contact hole.

6. The display device of claim 1 , wherein the contact hole includes:
a first contact hole part having a first inclination measured from a vertical imaginary axis; and
a second contact hole part defined on the first contact hole part and having a second inclination measured from the same vertical imaginary axis greater than the first inclination.

7. The display device of claim 6 , wherein a minimum value of a width in the one direction of the first contact hole part is about 1.8 micrometers or more and less than about 2.5 micrometers.

8. The display device of claim 1 , wherein the light emitting element includes:
a first electrode disposed on the organic insulating layer;
a light emitting layer disposed on the first electrode; and
a second electrode disposed on the light emitting layer,
wherein an upper contact hole exposing an upper surface of the connection electrode is defined in the organic insulating layer, and
wherein a portion of the first electrode is disposed in the upper contact hole and connected to the connection electrode.

9. A display device comprising:
a base layer;
a circuit layer disposed on the base layer; and
a light emitting element disposed on the circuit layer;
wherein the circuit layer includes:
at least one organic insulating layer in which a contact hole is defined; and
a connection electrode, a portion of the connection electrode being disposed in the contact hole,
wherein the contact hole includes:
a first contact hole part having a first inclination measured from a vertical imaginary axis; and
a second contact hole part defined on the first contact hole part and having a second inclination measured from the same vertical imaginary axis,
wherein the second inclination of the second contact hole part is greater than the first inclination of the first contact hole part with respect to the vertical imaginary axis, and
wherein a minimum value of a width in one direction of the first contact hole part is about 1.8 micrometers or more and less than about 2.5 micrometers.

Assignees

• Samsung Display Co Ltd

Inventors

• Kim Youn Joon
• Ju Jinho
• Choi Jonghyun

Classifications

• H10K71/00

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

• H10K2102/311

  Flexible OLED · CPC title

• H10K77/111

  Flexible substrates · CPC title

• H10K59/1201

  Manufacture or treatment · CPC title

• H10K59/124

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