Method of manufacturing an organic EL display device, and organic EL display device

Patent metadata

Field	Value
Publication number	US-9865834-B2
Application number	US-201615091731-A
Country	US
Kind code	B2
Filing date	Apr 6, 2016
Priority date	Apr 6, 2015
Publication date	Jan 9, 2018
Grant date	Jan 9, 2018

Abstract

A method of manufacturing a display device includes forming a three-layer laminate by laminating a first transparent conductive film, a metal film, and a second transparent conductive film in order from a substrate side. The three-layer laminate forms a plurality of anode electrodes arranged in a pixel region and a plurality of dummy electrodes arranged on an outer side of the pixel region. The method of manufacturing a display device also includes subjecting the second transparent conductive film and the metal film to etching and subjecting the first transparent conductive film to etching. A density of a pattern of the plurality of dummy electrodes is reduced as a distance from the pixel region is increased.

First claim

What is claimed is:

1. A method of manufacturing an organic EL display device, comprising:
forming a three-layer laminate by laminating a first transparent conductive film, a metal film, and a second transparent conductive film in order from a substrate side, wherein the three-layer laminate forms a plurality of anode electrodes arranged in a pixel region and a plurality of dummy electrodes arranged on an outer side of the pixel region;
subjecting the second transparent conductive film and the metal film to etching; and
subjecting the first transparent conductive film to etching,
wherein a number of the plurality of dummy electrodes per area is reduced as a distance from the pixel region is increased.

2. The method of manufacturing an organic EL display device according to claim 1 , wherein the number of the plurality of dummy electrodes is reduced as the distance from the pixel region is increased.

3. The method of manufacturing an organic EL display device according to claim 1 , wherein the etching of the second transparent conductive film and the metal film is carried out under a state in which the substrate is inclined.

4. The method of manufacturing an organic EL display device according to claim 3 , wherein the number of the plurality of dummy electrodes per area is reduced in a direction toward an upstream side of a flow of an etchant, which is caused by the inclination.

5. The method of manufacturing an organic EL display device according to claim 1 , wherein the metal film is made of silver.

6. The method of manufacturing an organic EL display device according to claim 1 , wherein the first transparent conductive film and the second transparent conductive film are made of ITO.

7. The method of manufacturing an organic EL display device according to claim 1 , wherein the etching of the first transparent conductive film is carried out by oxalic acid.

8. The method of manufacturing an organic EL display device according to claim 1 , wherein the etching of the second transparent conductive film and the metal film is carried out by mixed acid.

9. The method of manufacturing an organic EL display device according to claim 1 , wherein the plurality of dummy electrodes are arranged on an upstream side of an etchant used in the etching of the metal film.

10. The method of manufacturing an organic EL display device according to claim 1 , wherein the plurality of dummy electrodes are arranged adjacent to a plurality of dummy pixels arranged adjacent to and on the outer side of the pixel region.

11. An organic EL display device, comprising:
a plurality of anode electrodes arranged in a pixel region; and
a plurality of dummy electrodes arranged on an outer side of the pixel region,
wherein a number of the plurality of dummy electrodes per area is reduced as a distance from the pixel region is increased,
wherein the plurality of anode electrodes and the plurality of dummy electrodes comprise a three-layer laminate in which a first transparent conductive film, a metal film, and a second transparent conductive film are laminated in order from a substrate side.

Assignees

• Japan Display Inc

Inventors

• Kanda Noriyoshi
• Kaida Masakazu

Classifications

• H01L27/3244

  Electricity · mapped topic

• H01L51/5218 Primary

  Electricity · mapped topic

• H10K59/131 Primary

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

• H10K50/818

  Reflective anodes, e.g. ITO combined with thick metallic layers · CPC title

• H10D86/441

  Interconnections, e.g. scanning lines · CPC title