DISPLAY DEVICE, METHOD OF MANUFACTURING THE DISPLAY DEVICE, AND ELECTRONIC APPARATUS

• US 20170278919A1
• Filed: 09/09/2015
• Published: 09/28/2017
• Est. Priority Date: 09/22/2014
• Status: Active Grant

• Current Assignee: Sony Corporation (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: MATSUMI, TATSUYA
• Granted Patent: US 10,186,569 B2
• Time in Patent Office: Days
• CPC Class Codes: H10K 50/824 combined with auxiliary electrodes
• CPC Class Codes: H10K 59/1315 comprising structures specially adapted for lowering the resistance
• CPC Class Codes: H10K 59/40 OLEDs integrated with touch screens
• CPC Class Codes: H10K 59/80522 combined with auxiliary electrodes
• CPC Class Codes: H10K 59/80524 Transparent cathodes, e.g. comprising thin metal layers

Abstract

A display device includes a base, an organic light-emitting element including a stacked structure that has a first electrode layer, an organic light-emitting layer, and a second electrode layer that are stacked in order on the base, a drive element that is provided on the base, and drives the organic light-emitting element, and an auxiliary electrode layer provided on the base, and including an end surface that is in contact with the second electrode layer.

Claims

1. A display device comprising:

a base;

an organic light-emitting element including a stacked structure, the stacked structure having a first electrode layer, an organic light-emitting layer, and a second electrode layer that are stacked in order on the base;

a drive element that is provided on the base, and drives the organic light-emitting element; and

an auxiliary electrode layer provided on the base, and including an end surface that is in contact with the second electrode layer.

2. The display device according to claim 1, wherein the auxiliary electrode layer is provided in a level that includes the drive element.

3. The display device according to claim 1, wherein the auxiliary electrode layer has a thickness that is larger than a thickness of the organic light-emitting layer.

4. The display device according to claim 1, wherein the auxiliary electrode layer has conductivity that is higher than conductivity of the second electrode layer.

5. The display device according to claim 1, wherein the end surface of the auxiliary electrode layer is perpendicular to a surface of the base, or extends in an overhanging fashion in a direction of increasing distance from the base.

6. The display device according to claim 1, wherein

the drive element includes a wiring line layer, and

the wiring line layer of the drive element has a constituent material that is same as a constituent material of the auxiliary electrode layer.

7. The display device according to claim 1, further comprising an underlayer provided between the base and the auxiliary electrode layer, wherein

the drive element includes a gate electrode, and

the underlayer has a constituent material that is same as a constituent material of the gate electrode.

8. The display device according to claim 1, wherein the second electrode layer has light transmittance that is higher than light transmittance of the auxiliary electrode layer.

9. The display device according to claim 1, wherein

the auxiliary electrode layer is formed by a vacuum vapor deposition method, and

the second electrode layer is formed by a sputter deposition method.

10. The display device according to claim 1, wherein

a portion of the auxiliary electrode layer is covered with an insulating layer, and

the insulating layer has an opening in a region overlapped with the auxiliary electrode layer.

11. The display device according to claim 10, wherein an angle formed by a straight line and a direction that is perpendicular to a surface of the base is 45°

or less, the straight line joining;

an upper edge that faces the end surface of the auxiliary electrode layer in the opening of the insulating layer; and

an upper edge of the end surface of the auxiliary electrode layer.

12. A method of manufacturing a display device, the method comprising:

forming, on a base, a drive element and an auxiliary electrode layer;

forming a first insulating layer so as to cover the drive element and the auxiliary electrode layer;

forming a first opening on a portion of the first insulating layer to expose an end surface of the auxiliary electrode layer;

selectively forming a first electrode layer on the first insulating layer;

forming a second insulating layer on the first insulating layer, the second insulating layer having a second opening at a position that corresponds to the first electrode layer and a third opening at a position that corresponds to the auxiliary wiring line layer, the third opening being in communication with the first opening;

forming an organic light-emitting layer so as to cover the first electrode layer without covering the end surface of the auxiliary wiring line layer; and

forming a second electrode layer so as to cover both the organic light-emitting layer and the end surface of the auxiliary wiring line layer.

13. An electronic apparatus with a display device, the display device comprising:

a base;

an organic light-emitting element including a stacked structure, the stacked structure having a first electrode layer, an organic light-emitting layer, and a second electrode layer that are stacked in order on the base;

a drive element that is provided on the base, and drives the organic light-emitting element; and

an auxiliary electrode layer provided on the base, and including an end surface that is in contact with the second electrode layer.