Method of manufacturing organic electroluminescent element
View Patent ↗A structure and a method of manufacturing the organic electroluminescent (EL) elements, patterns of icons on the display panel of organic EL elements are formed. Initially, ramparts are formed on a continuous surface of a transparent and conductive film, i.e. an indium-tin oxide (ITO) film, and ramparts determine patterns of icons, then organic function layers and electrodes are formed. Processes are compatible to a conventional method of manufacturing an array type display panel, to improve disadvantages of dividing processes of array type display panels and organic EL elements into two portions.
1. A method of manufacturing an organic electroluminescent (EL) element to form a pattern on a display panel, comprising:
providing a substrate;
forming a first display electrode having a continuous surface on the substrate;
forming a rampart structure on the continuous surface of the first display electrode for isolating the continuous surface of the first display electrode into a first portion and a second portion, wherein the rampart structure is disposed on the second portion of the first display electrode and the first portion of the continuous surface of the first display electrode is the same as the pattern;
forming at least one organic function layer on the first portion of the first display electrode and the rampart structure; and
forming a second display electrode on the organic function layer.
2. The method according to claim 1 , wherein the first display electrode is composed of light-transparent conductive material.
3. The method according to claim 1 , wherein the first display electrode is made of indium-tin oxide (ITO).
4. The method according to claim 1 , wherein the organic function layer further includes an emitting layer.
5. The method according to claim 4 , wherein the organic function layer includes a hole injection layer, a hole transport layer, an electron transport and an electron injection layer.
6. The method according to claim 1 , wherein the rampart is formed by a one mask process.
7. The method according to claim 1 , wherein the second display electrode is metal layer.
8. The method according to claim 1 , wherein the second portion of the organic function layer is formed abutted on the rampart structure.
9. The method according to claim 1 , wherein the first portion of the organic function layer and the second portion of the organic function layer are formed to be discontinuous.
10. A method of manufacturing an icon structure of an organic electroluminescent (EL) display, comprising:
providing a substrate;
forming a first continuous display electrode, disposed on the substrate;
forming an organic function layer having a first portion with the same pattern with the icon structure, abutted on a first portion of the first continuous display electrode;
forming a rampart structure, located on a second portion of the first continuous display electrode; and
forming a second display electrode, located on the organic function layer.
11. The method according to claim 10 , wherein the second portion of the organic function layer is formed abutted on the rampart structure.
12. The method according to claim 10 , wherein the first portion of the organic function layer and the second portion of the organic function layer are formed to be discontinuous.