Organic light emitting display device and method of manufacturing organic light emitting display device

Patent metadata

Field	Value
Publication number	US-12439687-B2
Application number	US-201917417632-A
Country	US
Kind code	B2
Filing date	Mar 6, 2019
Priority date	Jan 11, 2019
Publication date	Oct 7, 2025
Grant date	Oct 7, 2025

Abstract

An organic light emitting display device includes a substrate including a first region and a second region, a first transistor, the first transistor including a first active layer having a source region and a drain region disposed in the first region on the substrate, a first gate electrode disposed on the first active layer, a first source electrode disposed on the first gate electrode, the first source electrode being connected to the source region, a sacrificial layer structure disposed to be spaced apart from the first source electrode, the sacrificial layer structure having an opening, a protective insulating layer disposed on the first source electrode and the sacrificial layer structure, and a first drain electrode disposed on the protective insulating layer, and a sub-pixel structure disposed on the first transistor.

First claim

The invention claimed is:

1. An organic light emitting display device comprising:
a substrate having a light emitting region that includes a first region and a second region, a peripheral region that surrounds the light emitting region, and a bending region that is disposed in one side of the peripheral region;
a first transistor, the first transistor including:
a first active layer having a source region and a drain region disposed in the first region on the substrate,
a first gate electrode disposed on the first active layer with a gate insulating layer disposed between the first active layer and the first gate electrode,
a first source electrode disposed on the first gate electrode with a first insulating interlayer disposed between the first gate electrode and the first source electrode, the first source electrode being connected to the source region,
a sacrificial layer structure disposed to be spaced apart from the first source electrode, the sacrificial layer structure having an opening,
a protective insulating layer disposed on the first source electrode and the sacrificial layer structure, and
a first drain electrode disposed on the protective insulating layer, the first drain electrode being connected to the drain region through a contact hole including the opening, and

a sub-pixel structure disposed on the first transistor,
wherein a groove exposing the bending region of the substrate is formed without creating a step, and
wherein the groove is formed from a same layer toward the substrate as the contact hole and further includes a removed part of the substrate, and a height of the contact hole is less than a height of the groove.

2. The organic light emitting display device of claim 1 , wherein the sacrificial layer structure is disposed to overlap the drain region in a plan view, and the sacrificial layer structure and the first source electrode are disposed on a same layer.

3. The organic light emitting display device of claim 1 , wherein the first drain electrode is in direct contact with the sacrificial layer structure through the opening.

4. The organic light emitting display device of claim 1 , wherein a thickness of the sacrificial layer structure is identical to a thickness of the first source electrode.

5. The organic light emitting display device of claim 1 , wherein a second transistor includes: a second active layer disposed on a second gate electrode; and second source and second drain electrodes disposed on lateral portions of the second active layer, respectively.

6. The organic light emitting display device of claim 5 , wherein the sacrificial layer structure includes:
a lower sacrificial layer pattern disposed on a same layer with the second active layer, the lower sacrificial layer pattern having a first opening; and
an upper sacrificial layer pattern disposed on the lower sacrificial layer pattern, the upper sacrificial layer pattern having a second opening that overlaps the first opening in a plan view, and
wherein the first opening and the second opening correspond to the opening of the sacrificial layer structure.

7. The organic light emitting display device of claim 6 , wherein a thickness of the lower sacrificial layer pattern is identical to a thickness of the second active layer and a thickness of the upper sacrificial layer pattern is identical to a thickness of each of the first source electrode, the second source electrode and the second drain electrode.

8. The organic light emitting display device of claim 6 , wherein a thickness of the lower sacrificial layer pattern is identical to a thickness of the second active layer and a thickness of the upper sacrificial layer pattern is less than a thickness of each of the first source electrode, the second source electrode and the second drain electrode.

9. The organic light emitting display device of claim 5 , wherein the sacrificial layer structure is disposed on a same layer with the second active layer and a thickness of the sacrificial layer structure is identical to a thickness of the second active layer.

10. The organic light emitting display device of claim 5 , wherein each of the first source electrode, the second source electrode and the second drain electrode has a first thickness, and the first drain electrode has a second thickness, and
wherein the second thickness is greater than the first thickness.

11. The organic light emitting display device of claim 5 , wherein the first transistor has a top gate structure, and the first active layer includes a silicon-based semiconductor, and
wherein the second transistor has a bottom gate structure, and the second active layer includes a metal oxide-based semiconductor.

12. The organic light emitting display device of claim 5 , further comprising:
a gate electrode pattern disposed on the first gate electrode to overlap the first gate electrode in a plan view,
wherein the gate electrode pattern is disposed on a same layer with the second gate electrode.

13. The organic light emitting display device of claim 1 , wherein the substrate has a recess in the bending region.

Assignees

• Samsung Display Co Ltd

Inventors

• Kim Myounghwa
• Kim Jaybum
• Son Kyoung-Seok
• Lee Seungjun
• Lee Seunghun
• Lim Jun-Hyung

Classifications

• H10D86/60

  wherein the TFTs are in active matrices · CPC title

• H10K2102/311

  Flexible OLED · CPC title

• H10K77/111

  Flexible substrates · CPC title

• H10K59/1201

  Manufacture or treatment · CPC title

• H10K59/1213 Primary

  the pixel elements being TFTs · CPC title