Organic light emitting diode and method of manufacturing

• US 8,901,579 B2
• Filed: 07/30/2012
• Issued: 12/02/2014
• Est. Priority Date: 08/03/2011
• Status: Active Grant

• Current Assignee: IGNIS Innovation Incorporated
• Original Assignee: IGNIS Innovation Incorporated
• Inventors: Chaji, Gholamreza, Moradi, Maryam
• Primary Examiner(s): Blum, David S
• Application Number:
  US13/561,411
• Publication Number:
  US 20130032831A1
• Time in Patent Office: 855 Days
• Field of Search: 257/88, 257/40, 257/E51.02
• US Class Current: 257/88
• CPC Class Codes: H10K 59/127 comprising two substrates, e.g. display comprising OLED array and TFT driving circuitry on different substrates
• CPC Class Codes: H10K 71/00 Manufacture or treatment specially adapted for the organic devices covered by this subclass
• CPC Class Codes: H10K 71/40 Thermal treatment, e.g. annealing in the presence of a solvent vapour
• CPC Class Codes: H10K 71/50 Forming devices by joining two substrates together, e.g. lamination techniques
• CPC Class Codes: H10K 71/621 Providing a shape to conductive layers, e.g. patterning or selective deposition

Abstract

Aspects of the present disclosure provide for manufacturing an organic light emitting diode (OLED) by forming two terminals of the OLED on two substrates of the display, and then depositing a plurality of layers of the OLED on one or both of the two terminals to form a first portion and a second portion of the OLED on each substrate. The two portions are joined together to form an assembled OLED. The deposition of the two portions can be stopped with each portion having approximately half of a common layer exposed. The two portions can then be aligned to be joined together and an annealing process can be employed to join together the two parts of the common layer and thereby form the OLED.

Claims

1. An organic light emitting diode comprising:

a first terminal formed on a first substrate of a display;

a second terminal formed on a second substrate of the display; and

a plurality of layers between the first terminal and the second terminal, the plurality of layers including a first portion and a second portion, the first portion being formed on a side of the first terminal, the second portion being formed on a side of the second terminal, the first and second portions being joined together such that the plurality of layers are in between the first terminal and the second terminal;

first spacers included in the first portion of the plurality of layers; and

second spacers included in the second portion of the plurality of layers, aligned such that the first spacers abut the second spacers,

wherein said first and second spacers are confined to said first and second portions, respectively, and do not extend into said first and second terminals.

2. The organic light emitting diode of claim 1, wherein the first terminal and the second terminal are each formed on the respective first and second substrates.

3. The organic light emitting diode of claim 1, wherein the first substrate is a transparent substrate encapsulating the display.

4. The organic light emitting diode of claim 1, wherein the second substrate is a substrate of a drain terminal of an n-type transistor for driving the organic light emitting diode.

5. The organic light emitting diode of claim 1, wherein the first terminal is an anode terminal of the organic light emitting diode and the second terminal is a cathode terminal of the organic light emitting diode.

6. The organic light emitting diode of claim 1, wherein the plurality of layers includes:

an emission layer, a hole transfer layer, or an electron transfer layer, and wherein the first portion and the second portion of the plurality of layers each include at least one layer of the plurality of layers.

7. The organic light emitting diode of claim 1, wherein the first portion of the plurality of layers includes a first part of a common layer, and the second portion of the plurality of layers includes a second part of the common layer, each of the first part and the second part being deposited distal the first and the second terminals of the organic light emitting diode, respectively.

8. The organic light emitting diode of claim 7, wherein the common layer is an electron transfer layer.

9. The organic light emitting diode of claim 1, further comprising:

a hole transfer and injection layer, and

banks engaging the ends of said hole transfer and injection layer and preventing said first and second portions from contacting said hole transfer and injection layer.

10. The organic light emitting diode of claim 1, further comprising:

a bank for preventing an electron transfer layer of the plurality of layers from abutting a hole injection layer of the plurality of layers.

11. The organic light emitting diode of claim 1, wherein the plurality of layers includes a planarization layer.