Organic light-emitting display device

• US 8,330,150 B2
• Filed: 07/01/2010
• Issued: 12/11/2012
• Est. Priority Date: 10/27/2009
• Status: Active Grant

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Inventors: Chung, Hyun-Joong, Park, Jin-Seong, Jeong, Jong-Han, Jeong, Jae-Kyeong, Kim, Min-Kyu, Ahn, Tae-Kyung, Yang, Hui-Won, Kim, Kwang-Suk, Kim, Eun-Hyun, Kang, Jae-Wook, Mo, Yeong-Gon, Im, Jae-Soon
• Primary Examiner(s): Huynh, Andy
• Application Number:
  US12/829,139
• Publication Number:
  US 20110095274A1
• Time in Patent Office: 894 Days
• Field of Search: 257/40, 257/43, 257/59, 257/72, 257/642, 257/E51.005, 257/E51.018, 257/E51.024
• US Class Current: 257/40
• CPC Class Codes: H01L 27/1225 with semiconductor materials not belonging to the group IV of the periodic table, e.g. InGaZnO
• CPC Class Codes: H01L 29/66969 of devices having semiconductor bodies not comprising group 14 or group 13/15 materials comprising selenium or tellurium in uncombined form other than as impurities in semiconductor bodies of other materials, comprising cuprous oxide or cuprous iodide H01L21/02365
• CPC Class Codes: H01L 29/7869 having a semiconductor body comprising an oxide semiconductor material, e.g. zinc oxide, copper aluminium oxide, cadmium stannate
• CPC Class Codes: H10K 2101/80 Composition varying spatially, e.g. having a spatial gradient
• CPC Class Codes: H10K 50/80 Constructional details
• CPC Class Codes: H10K 50/84 Passivation; Containers; Encapsulations
• CPC Class Codes: H10K 59/1201 Manufacture or treatment
• CPC Class Codes: H10K 59/1213 the pixel elements being TFTs
• CPC Class Codes: H10K 59/123 Connection of the pixel electrodes to the thin film transistors [TFT]
• CPC Class Codes: H10K 59/124 Insulating layers formed between TFT elements and OLED elements
• CPC Class Codes: H10K 59/87 Passivation; Containers; Encapsulations
• CPC Class Codes: H10K 71/00 Manufacture or treatment specially adapted for the organic devices covered by this subclass

Abstract

An organic light-emitting display device, which may be configured to prevent moisture or oxygen from penetrating the organic light-emitting display device from the outside is disclosed. An organic light-emitting display device, which is easily applied to a large display device and/or may be easily mass produced is further disclosed. Additionally disclosed is a method of manufacturing an organic light-emitting display device. An organic light-emitting display device may include, for example, a thin-film transistor (TFT) including a gate electrode, an active layer insulated from the gate electrode, source and drain electrodes insulated from the gate electrode and contacting the active layer and an insulating layer disposed between the source and drain electrodes and the active layer; and an organic light-emitting diode electrically connected to the TFT. The insulating layer may include, for example, a first insulating layer contacting the active layer; and a second insulating layer formed of a metal oxide and disposed on the first insulating layer.

Claims

1. An organic light-emitting display device, comprising:

a thin-film transistor (TFT) comprising a gate electrode, an active layer insulated from the gate electrode, source and drain electrodes insulated from the gate electrode and contacting the active layer, and an insulating layer formed between the source and drain electrodes and the active layer; and

an organic light-emitting diode electrically connected to the TFT,

wherein the insulating layer comprises;

a first insulating layer contacting the active layer;

a second insulating layer substantially formed from a metal oxide and formed on the first insulating layer; and

a third insulating layer substantially formed from a metal oxide or a metal nitride and formed on the second insulating layer.

2. The organic light-emitting display device of claim 1, wherein the second insulating layer has a gradient of metal content with respect to its thickness.

3. The organic light-emitting display device of claim 2, wherein the metal content decreases toward the first insulating layer.

4. The organic light-emitting display device of claim 3, wherein the metal is substantially formed from aluminum, titanium, or an alloy thereof.

5. The organic light-emitting display device of claim 1, wherein the insulating layer further comprises a fourth insulating layer formed on the third insulating layer.

6. The organic light-emitting display device of claim 1, wherein the third insulating layer is substantially formed from aluminum oxide, aluminum nitride, titanium oxide or titanium nitride.

7. The organic light-emitting display device of claim 1, wherein a metal layer is formed between the second insulating layer and the third insulating layer.

8. The organic light-emitting display device of claim 7, wherein the metal layer is substantially formed from aluminum, titanium or an alloy thereof.

9. The organic light-emitting display device of claim 1, wherein the active layer is substantially formed from an oxide semiconductor.

10. The organic light-emitting display device of claim 1, wherein the first insulating layer is substantially formed from silicon oxide.