Organic light-emitting diode display and method of manufacturing the same

Patent metadata

Field	Value
Publication number	US-12279499-B2
Application number	US-202217817195-A
Country	US
Kind code	B2
Filing date	Aug 3, 2022
Priority date	Nov 23, 2015
Publication date	Apr 15, 2025
Grant date	Apr 15, 2025

Abstract

An organic light-emitting diode (OLED) display and a method of manufacturing the same are disclosed. In one aspect, the display includes a plurality of pixel electrodes positioned over a substrate and separate from each other, a plurality of auxiliary wirings between the pixel electrodes, a pixel-defining layer over the pixel electrodes except for a central portion of the pixel electrodes and at least a portion of each of the auxiliary wirings, an intermediate layer over the pixel-defining layer and having a plurality of openings formed over the portion of each of the auxiliary wirings, and an opposite electrode positioned over the intermediate layer and facing the pixel electrodes, the opposite electrode electrically contacting the auxiliary wirings via the openings. The auxiliary wirings extend in a first direction and separate from each other by a first distance. The openings are aligned in a diagonal direction crossing the first direction.

First claim

What is claimed is:

1. A display comprising:
a substrate;
an insulating layer disposed on the substrate;
a first electrode disposed on the insulating layer, wherein a portion of the first electrode extends through the insulating layer via a first contact hole in the insulating layer to contact a drain electrode;
a conductive layer disposed on the insulating layer on a same layer as the first electrode and spaced apart from the first electrode, wherein a portion of the conductive layer extends through the insulating layer via a second contact hole in the insulating layer to contact a wiring located on a same layer as the drain electrode;
a sub-wiring disposed below and crossing the wiring, wherein the sub-wiring is electrically connected to the wiring;
a pixel-defining layer having a first discontinuous portion exposing a part of the first electrode, and a second discontinuous portion exposing a part of the conductive layer;
an intermediate layer disposed over the pixel-defining layer and surrounding a third discontinuous portion overlapping the second discontinuous portion, wherein the intermediate layer is in direct contact with both the conductive layer and the first electrode and is electrically connected with the drain electrode via the first electrode and with the wiring via the conductive layer; and
a second electrode disposed over the intermediate layer and facing the first electrode, wherein a first portion of the second electrode is disposed over the first electrode, wherein a second portion of the second electrode extends below an upper surface of the insulating layer via the second contact hole in the insulating layer and via the third discontinuous portion, and wherein the second portion of the second electrode has a same material composition as the first portion of the second electrode and has a thickness different from the first portion;
wherein the conductive layer is electrically connected to the second electrode through the third discontinuous portion and extends below the upper surface of the insulating layer via the second contact hole.

2. The display of claim 1 , further comprising:
a transistor above the substrate, the transistor including a semiconductor layer, a gate electrode, and an electrode layer over the gate electrode, wherein the first electrode is electrically connected to the transistor;
wherein the insulating layer is interposed between the electrode layer and the first electrode, wherein the wiring extends in a first direction, and wherein the conductive layer is disposed on the wiring.

3. The display of claim 2 ,
wherein the wiring is positioned on a same layer as the electrode layer, and
the sub-wiring is positioned on a same layer as the gate electrode and includes a same material as the gate electrode.

4. The display of claim 1 ,
wherein the wiring has a width less than a width of the third discontinuous portion,
the conductive layer has a width greater than the third discontinuous portion, and
a distance between the conductive layer and the first electrode is less than a distance between the wiring and the drain electrode.

5. The display of claim 1 ,
wherein the conductive layer includes a same material as the first electrode.

6. The display of claim 1 ,
wherein the intermediate layer comprises an emission layer between the first electrode and the second electrode, the emission layer being patterned to correspond to the first electrode.

7. The display of claim 6 ,
wherein the intermediate layer further comprises a first intermediate layer interposed between the emission layer and the first electrode, and the intermediate layer further comprises a second intermediate layer interposed between the emission layer and the second electrode.

8. The display of claim 1 ,
wherein a portion of the intermediate layer that is adjacent to the third discontinuous portion is configured to be transformed by heat.

9. The display of claim 1 ,
wherein the intermediate layer has the third discontinuous portion for electrically connecting the conductive layer to the second electrode, and
the intermediate layer is spaced apart from the insulating layer by the conductive layer.

10. The display of claim 7 ,
wherein the third discontinuous portion comprises a first sub-discontinuous portion in the first intermediate layer and a second sub-discontinuous portion in the second intermediate layer.

11. The display of claim 2 ,
wherein the wiring includes a same material as the electrode layer.

12. A display comprising:
a substrate;
a plurality of wirings disposed on the substrate, the plurality of wirings extending in a first direction and being separated from each other in a second direction crossing the first direction;
an insulating layer disposed on the substrate and the plurality of wirings;
a plurality of first electrodes over the insulating layer on the substrate, the first electrodes being separated from each other in the second direction, wherein a portion of a first electrode of the plurality of first electrodes extends through the insulating layer via a first contact hole in the insulating layer to contact a drain electrode disposed on a same layer as of the plurality of wirings;
a plurality of contact portions disposed on the insulating layer on a same layer as the plurality of first electrodes and including a contact portion spaced apart from the first electrode in the second direction, wherein a portion of the contact portion extends through the insulating layer via a second contact hole in the insulating layer to contact an auxiliary wiring of the plurality of wirings, and wherein first adjacent ones of the plurality of contact portions are spaced apart in the first direction, separated by at least two of the plurality of first electrodes, and second adjacent ones of the plurality of contact portions are spaced apart in the first direction, separated by at least two of the plurality of first electrodes, and shifted a predetermined distance in the second direction to be aligned in a diagonal direction;
a second electrode disposed over the plurality of first electrodes and the contact portion, wherein a first portion of the second electrode is disposed over the first electrode, wherein a second portion of the second electrode extends below an upper surface of the insulating layer via the second contact hole in the insulating layer, and wherein the second portion of the second electrode has a same material composition as the first portion of the second electrode; and
an intermediate layer disposed below the second electrode, wherein the intermediate layer is in direct contact with both the contact portion and the plurality of first electrodes and is electrically connected with the drain electrode via the first electrode and with the auxiliary wiring via the contact portion,
wherein the second electrode is electrically connected to the plurality of wirings through the plurality of contact portions.

13. The display of claim 12 ,
wherein the plurality of contact portions are disposed in a shape of a parallelogram.

14. The display of claim 12 ,
wherein the contact portion is disposed between the first electrode of the plurality of first electrodes and a second first electrode of the plurality of first electrodes closest to the first electrode in the second direction,
the contact portion is not located between the first electrode and another first electrode closest to a third direction opposite to the second direction.

15. The display of claim 12 ,
wherein the plurality of contact portions include a first contact portion at a first interval in the s

Assignees

• Samsung Display Co Ltd

Inventors

• Cho Youngjin
• Kang Chulkyu
• Kim Yongjae

Classifications

• H10K59/80522

  combined with auxiliary electrodes · CPC title

• H10K59/1201

  Manufacture or treatment · CPC title

• H10K50/824

  combined with auxiliary electrodes · CPC title

• H10K59/1315 Primary

  comprising structures specially adapted for lowering the resistance · CPC title

• H10K59/122 Primary

  Pixel-defining structures or layers, e.g. banks · CPC title