Method of preparing organic light emitting device

• US 9,276,234 B2
• Filed: 09/07/2012
• Issued: 03/01/2016
• Est. Priority Date: 03/02/2012
• Status: Active Grant

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Inventors: Park, Jin-Woo
• Primary Examiner(s): Yuan, Dah-Wei D
• Assistant Examiner(s): Dagenais, Kristen A
• Application Number:
  US13/607,311
• Publication Number:
  US 20130230664A1
• Time in Patent Office: 1,271 Days
• US Class Current: 1/1
• CPC Class Codes: H10K 50/844 Encapsulations
• CPC Class Codes: H10K 59/873 Encapsulations
• CPC Class Codes: H10K 71/00 Manufacture or treatment specially adapted for the organic devices covered by this subclass

Abstract

A method of preparing an organic light-emitting device includes forming an organic emission unit on a substrate, and forming a thin film encapsulation layer that contacts an environmental element, and that includes at least one inorganic layer including a low temperature viscosity transition (LVT) inorganic material, wherein the inorganic layer is formed using a process including forming a pre-inorganic layer including the LVT inorganic material by providing the LVT inorganic material onto the organic emission unit on which the environmental element is located, performing a first healing process on the pre-inorganic layer at a temperature greater than a viscosity transition temperature of the LVT inorganic material, and performing a second healing process on the pre-inorganic layer having undergone the first healing process to increase a binding force between the environmental element and the LVT inorganic material, and to increase a binding force among the LVT inorganic material.

Claims

1. A method of preparing an organic light-emitting device, the method comprising:

forming an organic emission unit on a substrate; and

forming a thin film encapsulation layer that contacts an environmental element, and that comprises at least one inorganic layer comprising a low temperature viscosity transition (LVT) inorganic material,

wherein the inorganic layer is formed using a process comprising;

forming a pre-inorganic layer comprising the LVT inorganic material by providing the LVT inorganic material onto the organic emission unit on which the environmental element is located;

performing a first healing process on the pre-inorganic layer at a temperature greater than a viscosity transition temperature of the LVT inorganic material; and

performing a second healing process on the pre-inorganic layer having undergone the first healing process to increase a binding force between the environmental element and the LVT inorganic material, and to increase a binding force among the LVT inorganic material, the second healing process comprising chemical treatment,

wherein the pre-inorganic layer having undergone the first healing process is treated with at least one selected from the group consisting of an acidic solution, an alkaline solution, and a neutral solution.

2. The method of claim 1, wherein the alkaline solution comprises a nitrate.