Organic light emitting diode and method for producing the same

• US 20030193057A1
• Filed: 12/12/2002
• Published: 10/16/2003
• Est. Priority Date: 04/10/2002
• Status: Active Grant

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Samsung SDI Company Limited
• Inventors: Uhlig, Albrecht, Humbs, Werner, Schadig, Marcus
• Granted Patent: US 6,774,392 B2
• Time in Patent Office: Days
• US Class Current: 257/88
• CPC Class Codes: H10K 59/122 Pixel-defining structures or layers, e.g. banks
• CPC Class Codes: H10K 59/173 comprising banks or shadow masks
• CPC Class Codes: H10K 71/13 using printing techniques, e.g. ink-jet printing or screen printing

Abstract

An organic light emitting diode (OLED) includes a substrate having a first electrode layer formed thereon in a predetermined pattern, an insulator layer defining the upper portion of the substrate having the first electrode layer in a predetermined pattern, an organic polymer layer formed based on the pattern defined by the insulator layer, a barrier for blocking flow of the organic polymer layer at both ends of the pattern defined by the insulator layer, and a second electrode layer formed on the organic polymer layer.

Claims

1. An organic light emitting diode (OLED), comprising:

a substrate having a first electrode layer formed thereon in a predetermined pattern;

an insulator layer formed on the first electrode layer in a predetermined pattern;

an organic polymer layer formed in the predetermined pattern defined by the insulator layer;

a barrier for blocking flow of the organic polymer layer at open ends of the pattern defined by the insulator layer; and

a second electrode layer formed on the organic polymer layer.

2. The OLED according to claim 1, wherein the insulator layer comprises:

a first insulator layer formed on the first electrode layer and having openings to partially expose the first electrode layer; and

a second insulator layer formed on the first insulator layer and having a pattern defined thereon.

3. The OLED according to claim 1, wherein shape of the barrier is one of a cuboid, a cylinder and a pyramid.

4. The OLED according to claim 2, wherein the barrier is equal to or narrower in width than the pattern of the second insulator layer.

5. The OLED according to claim 1, wherein the barrier is at least about 50 nm high.

6. The OLED according to claim 1, wherein the barrier is at least about 1 μ

m high and lower than the insulator layer.

7. The OLED according to claim 1, wherein the barrier is made of an insulator material.

8. A method for producing an organic light emitting diode (OLED), comprising:

forming a first electrode layer on a substrate in a predetermined pattern;

forming a channel on the the first electrode layer using an insulator material, wherein both ends of the channel are defined by a barrier;

forming an organic polymer layer on a pattern defined by the insulator layer by applying a liquid-phase organic polymer into the channel;

forming a second electrode layer on the organic polymer layer; and

sealing the substrate.

9. The method according to claim 8, wherein the step of applying a liquid-phase organic polymer into the channel is performed by ink-jet printing technique.

10. The method according to claim 8, wherein the barrier is equal to or narrower in width than the pattern of the channel.

11. An organic light emitting diode (OLED), comprising:

a substrate having a first electrode layer formed thereon in a predetermined pattern;

an insulator layer formed on the first electrode layer, wherein the insulator layer forms channels over the first electrode layer;

an organic polymer layer formed in the channels defined by the insulator layer;

a barrier for blocking flow of the organic polymer layer at each end of the channels of the insulator layer; and

a second electrode layer formed on the organic polymer layer.