Display device and manufacturing method thereof

Patent metadata

Field	Value
Publication number	US-12197093-B2
Application number	US-202418418281-A
Country	US
Kind code	B2
Filing date	Jan 21, 2024
Priority date	Nov 1, 2021
Publication date	Jan 14, 2025
Grant date	Jan 14, 2025

Abstract

A display device includes: a base substrate, a transistor disposed on the base substrate, an organic layer disposed on the transistor, a display element layer disposed on the organic layer, and a pixel electrode disposed between the organic layer and the display element layer. The pixel electrode includes a first electrode layer disposed between the organic layer and the display element layer and containing an organic matter derived from the organic layer, and a second electrode layer disposed between the first electrode and the display element layer and not containing the organic matter.

First claim

What is claimed is:

1. A display device manufacturing method using a display device manufacturing apparatus including a front-stage chamber and a rear-stage chamber, the method comprising:
providing the front-stage chamber with a preliminary display substrate including a base substrate, a transistor disposed on the base substrate, and an organic layer disposed on the transistor;
forming a first electrode layer on the organic layer in the front-stage chamber;
changing an inside of the front-stage chamber into a vacuum state after the forming of the first electrode layer; and
forming a second electrode layer on the first electrode layer after the changing of the inside of the front-stage chamber into a vacuum state,
wherein the first electrode layer contains an organic matter derived from the organic layer, and the second electrode layer does not contain the organic matter.

2. The display device manufacturing method of claim 1 , wherein the forming of the first electrode layer and the forming of the second electrode layer each comprise depositing a metal oxide, and
a first time taken to deposit the metal oxide in the forming of the first electrode layer is shorter than a second time taken to deposit the metal oxide in the forming of the second electrode layer.

3. The display device manufacturing method of claim 2 , wherein a ratio of the first time and the second time is about 1:1.75 to about 1:4.50.

4. The display device manufacturing method of claim 1 , wherein the forming of the first electrode layer comprises introducing the organic matter, which is discharged from the organic layer into the first electrode layer.

5. The display device manufacturing method of claim 4 , wherein the organic matter comprises a carbon trioxide.

6. The display device manufacturing method of claim 5 , wherein the organic matter further comprises carbon.

7. The display device manufacturing method of claim 1 , wherein the changing of the inside of the front-stage chamber into the vacuum state comprises removing the organic matter from the inside of the front-stage chamber.

8. The display device manufacturing method of claim 1 , further comprising:
providing the rear-stage chamber with the preliminary display substrate on which the first electrode layer and the second electrode layer are deposited; and
forming, in the rear-stage chamber, a third electrode layer not containing the organic matter, on the second electrode layer.

Assignees

• Samsung Display Co Ltd

Inventors

• Lee Jung-Woo

Classifications

• G02F1/1333

  Constructional arrangements; {Manufacturing methods}(G02F1/135, G02F1/136 take precedence) · CPC title

• G02F1/13439

  characterised by their electrical, optical, physical properties; materials therefor; method of making · CPC title

• G02F1/1303

  Apparatus specially adapted to the manufacture of LCDs · CPC title

• H10K71/164

  using vacuum deposition · CPC title

• H10D86/60

  wherein the TFTs are in active matrices · CPC title