Organic light-emitting display device

• US 8,227,804 B2
• Filed: 02/09/2011
• Issued: 07/24/2012
• Est. Priority Date: 02/16/2010
• Status: Active Grant

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Samsung Mobile Display Company Limited (Samsung Electronics Co. Ltd.)
• Inventors: Yang, Huiwon, Im, Ki-Ju, Choi, Chaun-Gi, Kim, Eun-Hyun, Mo, Steve Y. G.
• Primary Examiner(s): MENZ, DOUGLAS M
• Application Number:
  US13/023,686
• Publication Number:
  US 20110198584A1
• Time in Patent Office: 531 Days
• Field of Search: 257/43, 257/79
• US Class Current: 257/43
• CPC Class Codes: H10K 59/1213 the pixel elements being TFTs

Abstract

An organic light-emitting display device including: a gate electrode formed on a substrate; a first insulating layer formed on the gate electrode; an active layer formed on the first insulating layer, facing the gate electrode; a second insulating layer formed on the first insulating layer, having first openings to expose the active layer; source/drain electrodes formed on the second insulating layer, so as to be connected to exposed portions of the active layer through the first openings; and a metal layer formed on the active layer and contacting the second insulating layer.

Claims

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

a gate electrode formed on a substrate;

a first insulating layer formed on the gate electrode;

an active layer formed on the first insulating layer and facing the gate electrode;

a second insulating layer formed on the first insulating layer and having first openings to expose the active layer;

source/drain electrodes formed on the second insulating layer and connected to the active layer through the first openings of the second insulating layer; and

a metal layer formed on the active layer and contacting the second insulating layer;

wherein the metal layer is formed on the second insulating layer and extends through a second opening formed in the second insulating layer so as to directly contact a central portion of the active layer.

2. The organic light-emitting display device of claim 1, wherein the metal layer and the source/drain electrodes are coplanar.

3. The organic light-emitting display device of claim 1, wherein the active layer comprises an oxide semiconductor.

4. The organic light-emitting display device of claim 1, further comprising a buffer layer for planarizing the substrate.

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

a gate electrode formed on a substrate;

a first insulating layer formed on the substrate and covering the gate electrode;

an active layer formed on the first insulating layer and facing the gate electrode;

a metal layer formed directly on the active layer;

a second insulating layer formed on the first insulating layer and the active layer; and

source/drain electrodes formed on the second insulating layer and extending through the second insulating layer so as to contact the active layer;

wherein the metal layer and the source/drain electrodes are coplanar.

6. The organic light-emitting display device of claim 5, wherein the metal layer covers a channel region of the active layer so as to prevent the infiltration of at least one of moisture and water into the channel region.

7. The organic light-emitting display device of claim 5, wherein the metal layer is one of T-shaped and trapezoidal in cross-section.

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

a gate electrode formed on a substrate;

a first insulating layer formed on the gate electrode;

an active layer formed on the first insulating layer and facing the gate electrode;

a second insulating layer formed on the first insulating layer and having first openings to expose the active layer;

source/drain electrodes formed on the second insulating layer and connected to the active layer through the first openings of the second insulating layer; and

a metal layer formed on the active layer and contacting the second insulating layer;

wherein the metal layer and the source/drain electrodes are coplanar.

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

a gate electrode formed on a substrate;

a first insulating layer formed on the substrate and covering the gate electrode;

an active layer formed on the first insulating layer and facing the gate electrode;

a metal layer formed directly on the active layer;

a second insulating layer formed on the first insulating layer and the active layer; and

source/drain electrodes formed on the second insulating layer and extending through the second insulating layer to contact the active layer;

wherein the metal layer is one of T-shaped and trapezoidal.

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

a gate electrode formed on a substrate;

a first insulating layer formed on the substrate and covering the gate electrode;

an active layer formed on the first insulating layer and facing the gate electrode;

a second insulating layer formed on the first insulating layer and having an opening to expose the active layer;

a metal layer formed on the second insulating layer and extending through the opening so as to directly contact a central portion of the active layer; and

source/drain electrodes formed on the second insulating layer and extending through the second insulating layer so as to contact the active layer.