ORGANIC LIGHT-EMITTING DISPLAY DEVICE AND METHOD OF MANUFACTURING THE SAME

• US 20140027736A1
• Filed: 03/15/2013
• Published: 01/30/2014
• Est. Priority Date: 07/30/2012
• Status: Active Grant

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Inventors: You, Chun-Gi, Choi, Joon-Hoo
• Granted Patent: US 9,349,979 B2
• Time in Patent Office: Days
• US Class Current: 257/40
• CPC Class Codes: H01L 27/124 with a particular composition, shape or layout of the wiring layers specially adapted to the circuit arrangement, e.g. scanning lines in LCD pixel circuits wiring structures per se H01L23/52
• CPC Class Codes: H01L 27/1259 Multistep manufacturing methods
• CPC Class Codes: H01L 29/41733 for thin film transistors with insulated gate
• CPC Class Codes: H10K 50/805 Electrodes
• CPC Class Codes: H10K 59/1213 the pixel elements being TFTs

Abstract

An organic light-emitting display device and a method of manufacturing the same. The organic light-emitting display device includes: a substrate; an active layer on the substrate; a gate electrode insulated from the active layer and overlapping the active layer; a source electrode including a first source electrode layer connected to the active layer and a second source electrode layer connected to the first source electrode layer and being larger than the first source electrode layer; a drain electrode including a first drain electrode layer connected to the active layer and a second drain electrode layer connected to the first drain electrode layer and being larger than the first drain electrode layer; a first electrode electrically connected to the source electrode or the drain electrode; an intermediate layer on the first electrode and including an organic emission layer; and a second electrode on the intermediate layer.

Claims

1. An organic light-emitting display device comprising:

a substrate;

an active layer on the substrate;

a gate electrode insulated from the active layer and overlapping the active layer;

a source electrode comprising a first source electrode layer connected to the active layer and a second source electrode layer connected to the first source electrode layer, the second source electrode layer being larger than the first source electrode layer;

a drain electrode comprising a first drain electrode layer connected to the active layer and a second drain electrode layer connected to the first drain electrode layer, the second drain electrode layer being larger than the first drain electrode layer;

a first electrode electrically connected to the source electrode or the drain electrode;

an intermediate layer on the first electrode and comprising an organic emission layer; and

a second electrode on the intermediate layer.

2. The organic light-emitting display device of claim 1, further comprising:

a first interlayer insulating layer on the gate electrode and comprising a first contact hole; and

a second interlayer insulating layer on the first interlayer insulating layer and comprising a second contact hole.

3. The organic light-emitting display device of claim 2, wherein the first source electrode layer and the first drain electrode layer are formed to correspond to the first contact hole, and

the second source electrode layer and the second drain electrode layer are formed to correspond to the second contact hole.

4. The organic light-emitting display device of claim 2, wherein the first contact hole has a size smaller than that of the second contact hole.

5. The organic light-emitting display device of claim 2, wherein a plurality of the first contact holes are formed to be connected to the same second contact hole.

6. The organic light-emitting display device of claim 2, wherein the first interlayer insulating layer comprises an inorganic material, and the second interlayer insulating layer comprises an organic material.

7. The organic light-emitting display device of claim 2, wherein a top surface of the second interlayer insulating layer is planarized.

8. The organic light-emitting display device of claim 1, further comprising:

a storage area defined on the substrate, and

a capacitor in the storage area and comprising a first capacitor electrode and a second capacitor electrode.

9. The organic light-emitting display device of claim 8, further comprising:

a first interlayer insulating layer on the gate electrode; and

a second interlayer insulating layer on the first interlayer insulating layer,

wherein each of the first interlayer insulating layer and the second interlayer insulating layer comprises an opening corresponding to the capacitor.

10. The organic light-emitting display device of claim 8, further comprising a power supply wiring formed above the capacitor so as to overlap the capacitor.

11. The organic light-emitting display device of claim 10, wherein at least one insulating layer is disposed between the capacitor and the power supply wiring.

12. The organic light-emitting display device of claim 10, further comprising:

a first interlayer insulating layer on the gate electrode; and

a second interlayer insulating layer on the first interlayer insulating layer,

wherein the first interlayer insulating layer and the second interlayer insulating layer are disposed between the capacitor and the power supply wiring.

13. The organic light-emitting display device of claim 8, further comprising a data wiring formed above the capacitor so as to overlap the capacitor.

14. The organic light-emitting display device of claim 13, wherein at least one insulating layer is disposed between the capacitor and the data wiring.

15. The organic light-emitting display device of claim 13, further comprising:

a first interlayer insulating layer on the gate electrode; and

a second interlayer insulating layer on the first interlayer insulating layer,

wherein the first interlayer insulating layer and the second interlayer insulating layer are disposed between the capacitor and the data wiring.

16. The organic light-emitting display device of claim 8, further comprising

a power supply wiring and a data wiring formed above the capacitor so as to overlap the capacitor,

wherein the power supply wiring and the data wiring are formed as different layers so as to overlap each other.

17. The organic light-emitting display device of claim 16, further comprising:

a first interlayer insulating layer on the gate electrode; and

a second interlayer insulating layer on the first interlayer insulating layer,

wherein the power supply wiring is on the first interlayer insulating layer, and the data wiring is on the second interlayer insulating layer.

18. The organic light-emitting display device of claim 16, further comprising:

a first interlayer insulating layer on the gate electrode; and

a second interlayer insulating layer on the first interlayer insulating layer,

wherein the data wiring is on the first interlayer insulating layer, and the power supply wiring is on the second interlayer insulating layer.

19. The organic light-emitting display device of claim 8, wherein the first capacitor electrode is on the same layer as the active layer, and

the second capacitor electrode is on the same layer as the gate electrode.

20. The organic light-emitting display device of claim 1, wherein the first electrode comprises ITO, IZO, ZnO, In₂O₃, IGO, or AZO.

21. The organic light-emitting display device of claim 1, wherein the first electrode is on the same layer as the gate electrode.

22. The organic light-emitting display device of claim 1, wherein the gate electrode comprises a first conductive layer and a second conductive layer on the first conductive layer, and

the first electrode is formed on the same layer as the first conductive layer by using the same material used in forming the first conductive layer.

23. A method of manufacturing an organic light-emitting display device, the method comprising:

forming an active layer on a substrate;

forming a gate electrode insulated from the active layer and overlapping the active layer;

forming a source electrode comprising a first source electrode layer connected to the active layer and a second source electrode layer connected to the first source electrode layer, the second source electrode being larger than the first source electrode layer;

forming a drain electrode comprising a first drain electrode layer that is connected to the active layer and a second drain electrode layer connected to the first drain electrode layer, the second drain electrode layer being larger than the first drain electrode layer;

forming a first electrode electrically connected to the source electrode or the drain electrode;

forming an intermediate layer on the first electrode to comprise an organic emission layer; and

forming a second electrode on the intermediate layer.

24. The method of claim 23, further comprising:

forming a first interlayer insulating layer on the gate electrode, wherein the first interlayer insulating layer comprises a first contact hole; and

forming a second interlayer insulating layer on the first interlayer insulating layer, wherein the second interlayer insulating layer comprises a second contact hole.

25. The method of claim 24, wherein, each of the forming of the source electrode and the forming of the drain electrode comprises forming the first source electrode layer and the first drain electrode layer so as to correspond to the first contact hole and forming the second source electrode layer and the second drain electrode layer so as to correspond to the second contact hole.

26. The method of claim 25, wherein, each of the forming of the source electrode and the forming of the drain electrode comprises concurrently forming the first source electrode layer, the first drain electrode layer, the second source electrode layer, and the second drain electrode layer after the forming of the first interlayer insulating layer and the forming of the second interlayer insulating layer.