METHOD OF MANUFACTURING AN ORGANIC LIGHT EMITTING DEVICE

• US 20120252303A1
• Filed: 03/08/2012
• Published: 10/04/2012
• Est. Priority Date: 03/31/2011
• Status: Abandoned Application

• Current Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Original Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Inventors: Otsuka, Manabu, Endo, Taro, Hiroki, Tomoyuki, Takaya, Itaru, Ishige, Koichi, Sato, Nobuhiko
• Application Number:
  US13/415,317
• Publication Number:
  US 20120252303A1
• Time in Patent Office: Days
• US Class Current: 445/58
• CPC Class Codes: H10K 2102/3026 Top emission
• CPC Class Codes: H10K 50/824 combined with auxiliary electrodes
• CPC Class Codes: H10K 50/828 Transparent cathodes, e.g. comprising thin metal layers
• CPC Class Codes: H10K 59/1201 Manufacture or treatment
• CPC Class Codes: H10K 59/122 Pixel-defining structures or layers, e.g. banks
• CPC Class Codes: H10K 59/35 comprising red-green-blue [RGB] subpixels
• CPC Class Codes: H10K 59/80522 combined with auxiliary electrodes
• CPC Class Codes: H10K 59/80524 Transparent cathodes, e.g. comprising thin metal layers

Abstract

Provided is a method of manufacturing an organic light emitting device, which enables each of multiple organic light emitting elements included in the apparatus to emit uniform light. The method of manufacturing an organic light emitting device including multiple auxiliary electrodes in a display region, for electrically connecting an electrode and a circuit, includes the steps of: forming a protective member covering corresponding one of the multiple auxiliary electrodes; forming an organic compound layer; removing the protective member; and forming a second electrode to be electrically connected to the corresponding one of the multiple auxiliary electrodes. The removing of the protective member is carried out by immersing the substrate into a solvent capable of selectively dissolving a constituent material of the protective layer.

Claims

1. A method of manufacturing an organic light emitting device including:

multiple organic light emitting elements arranged in a display region of a substrate, each including a first electrode, an organic compound layer, and a second electrode in the stated order from the substrate side;

multiple auxiliary electrodes arranged in the display region; and

wiring provided on the substrate side with respect to the organic compound layer, the wiring being connectable to an external power supply,

the method enabling the second electrode and the wiring to be electrically connected to each other by the multiple auxiliary electrodes,

the method comprising the steps of;

forming a protective member covering corresponding one of the multiple auxiliary electrodes;

forming the organic compound layer;

removing the protective member; and

forming the second electrode to be electrically connected to the corresponding one of the multiple auxiliary electrodes,

wherein the removing the protective member is carried out by immersing the substrate into a solvent capable of selectively dissolving a constituent material of the protective member.

2. The method of manufacturing an organic light emitting device according to claim 1, wherein:

the forming of the protective member comprises;

forming a first protective layer covering the corresponding one of the multiple auxiliary electrodes;

forming a second protective layer on the first protective layer; and

processing the first protective layer and the second protective layer by patterning; and

the removing of the protective member is carried out by immersing the substrate into a solvent capable of selectively dissolving a constituent material of the first protective layer.

3. The method of manufacturing an organic light emitting device according to claim 2, wherein:

the first protective layer comprises a layer made of an organic material soluble in at least water;

the second protective layer comprises a layer made of a dampproof material;

the patterning comprises patterning using a photolithography method; and

the processing of the first protective layer and the second protective layer is carried out by dry etching.

4. The method of manufacturing an organic light emitting device according to claim 2, wherein the processing of the first protective layer and the second protective layer comprises:

forming the first protective layer so that a part of the first protective layer is hidden behind the second protective layer; and

processing the first protective layer so that, even after the forming of the organic compound layer is carried out, at least the part of the first protective layer hidden behind the second protective layer is exposed.

5. The method of manufacturing an organic light emitting device according to claim 1, further comprising, between the removing of the protective member and the forming of the second electrode to be electrically connected to the corresponding one of the multiple auxiliary electrodes, forming a layer containing an electron injection material,

wherein the electron injection material comprises a material containing at least one of an alkali metal and an alkaline-earth metal.