Method for repairing bank, organic EL display device, and method for manufacturing same

• US 9,837,640 B2
• Filed: 02/24/2015
• Issued: 12/05/2017
• Est. Priority Date: 03/07/2014
• Status: Active Grant

• Current Assignee: JDI Design and Development GK
• Original Assignee: JOLED Inc.
• Inventors: Hayashida, Yoshiki, Kobayashi, Kazuhiro, Onimaru, Toshiaki, Shimamura, Takayuki
• Primary Examiner(s): Nguyen, Sophia
• Application Number:
  US15/122,716
• Publication Number:
  US 20170077460A1
• Time in Patent Office: 1,015 Days
• CPC Class Codes: H10K 2102/00 Constructional details relating to the organic devices covered by this subclass
• CPC Class Codes: H10K 59/122 Pixel-defining structures or layers, e.g. banks
• CPC Class Codes: H10K 71/00 Manufacture or treatment specially adapted for the organic devices covered by this subclass
• CPC Class Codes: H10K 71/421 using coherent electromagnetic radiation, e.g. laser annealing
• CPC Class Codes: H10K 71/861 Repairing

Abstract

A bank repair method for repairing a defect portion of a bank in a process of manufacturing an organic electroluminescence (EL) display device including a substrate, banks formed over the substrate, and light-emitting layers formed in concave spaces defined by the banks. The bank repair method includes: examining whether or not a bank having a defect portion is present; and when a bank having a defect portion is present, repairing the bank by applying a repair material containing a gas adsorbent to the defect portion and curing the repair material; and after curing the repair material, baking the repair material by irradiating the repair material with infrared laser light.

Claims

1. A bank repair method for repairing a defect portion of a bank in a process of manufacturing an organic electroluminescence (EL) display device including a substrate, banks formed over the substrate, and light-emitting layers formed in concave spaces defined by the banks, the bank repair method comprising:

examining whether or not a bank having a defect portion is present; and

when the bank having the defect portion is present,

repairing the bank by applying a repair material containing a gas adsorbent to the defect portion and curing the repair material; and

after curing the repair material, baking the repair material by irradiating the repair material with infrared laser light,

wherein the gas adsorbent is zeolite.

2. The bank repair method of claim 1, wherein

the repair material is baked at a temperature between 180°

C. and 240°

C. through irradiation with the infrared laser light.

3. An organic electroluminescence (EL) display device comprising:

a substrate;

banks formed over the substrate; and

light-emitting layers disposed in concave spaces defined by the banks, wherein

a defect portion is present in the banks, and the defect portion has been repaired by using a repair material containing a gas adsorbent, and

the gas adsorbent is zeolite.

4. The organic EL display device of claim 3, wherein

a height of a highest part of the repair portion is no higher than a height of the banks, and a height of a lowest part of the repair portion is no lower than 80% of the height of the banks.

5. A method for manufacturing an organic EL display device by forming banks over a substrate and forming light-emitting layers in concave spaces defined by the banks, the method comprising:

examining whether or not a bank having a defect portion is present;

when the bank having the defect portion is present,

repairing the bank by applying a repair material containing a gas adsorbent to the defect portion and curing the repair material; and

after curing the repair material, baking the repair material by irradiating the repair material with infrared laser light; and

forming the light-emitting layers after baking the repair material,

wherein the pas adsorbent is zeolite.