Organic electroluminescent display panel and method of manufacturing the same

Abstract

A method of manufacturing an organic electroluminescent display panel includes the steps of: forming first electrodes on the substrate; forming organic layers by deposition; forming different light emitting layers for different luminous colors in desired areas; and forming second electrodes; wherein the organic layers are formed by an angle deposition method which performs deposition at more than a predetermined angle to the normal of the substrate.

What is claimed is:  
     
         1 . A method of manufacturing an organic electroluminescent display panel having light emitting portions in a plurality of luminous colors formed on a substrate, said method comprising the steps of: 
 forming first electrodes on the substrate;    forming organic layers by deposition;    forming different light emitting layers for different luminous colors in desired areas; and    forming second electrodes;    wherein in said organic layer forming step, the organic layers are formed by an angle deposition method.    
     
     
         2 . A method of manufacturing an organic electroluminescent display panel having light emitting portions in a plurality of luminous colors formed on a substrate, said method comprising the steps of: 
 forming first electrodes on the substrate;    simultaneously forming same first organic layers common to all the luminous colors in light emitting areas by deposition;    forming different second organic layers for different luminous colors in desired areas by deposition;    forming different light emitting layers for different luminous colors in desired areas; and    forming second electrodes;    wherein the first organic layers are formed by an angle deposition method and the second organic layers are deposited at a deposition angle smaller than that of the angle deposition method.    
     
     
         3 . The method according to  claim 2 , wherein at least one of the second organic layers is made of an organic material different from that of the first organic layers.  
     
     
         4 . The method according to  claim 2 , wherein the second organic layers are each made of different organic materials.  
     
     
         5 . The method according to  claim 2 , wherein the second organic layers are made of the same organic material and have different thicknesses.  
     
     
         6 . The method according to  claim 3 , wherein the second organic layer forming step is performed after the first organic layer forming step.  
     
     
         7 . The method according to  claim 1  or  2 , wherein the light emitting layers are each deposited at a deposition angle smaller than that of the angle deposition method.  
     
     
         8 . The method according to  claim 1  or  2 , wherein the second electrodes are deposited at a deposition angle smaller than that of the angle deposition method.  
     
     
         9 . The method according to  claim 2 , wherein the second organic layers are hole transport layers.  
     
     
         10 . The method according to  claim 2 , wherein the second organic layers are electron transport layers.  
     
     
         11 . An organic electroluminescent display panel having light emitting portions in a plurality of luminous colors formed on a substrate, said display panel comprising: 
 first electrodes formed on the substrate;    organic layers formed by deposition;    light emitting layers formed in desired areas according to the luminous colors; and    second electrodes;    wherein the organic layers are formed by an angle deposition method.    
     
     
         12 . An organic electroluminescent display panel having light emitting portions in a plurality of luminous colors formed on a substrate, said display panel comprising: 
 first electrodes formed on the substrate;    first organic layers formed in light emitting areas at one time by deposition;    second organic layers formed in desired areas and being different among different luminous colors;    light emitting layers formed in desired areas according to the luminous colors; and    second electrodes;    wherein the first organic layers are formed by an angle deposition method and the second organic layers are deposited at a deposition angle smaller than that of the angle deposition method.    
     
     
         13 . The organic electroluminescent display panel according to  claim 12 , wherein at least one of the second organic layers is made of an organic material different from that of the first organic layers.  
     
     
         14 . The organic electroluminescent display panel according to  claim 12 , wherein the second organic layers are each made of different organic materials.  
     
     
         15 . The organic electroluminescent display panel according to  claim 12 , wherein the second organic layers are made of the same organic material and have different thicknesses.  
     
     
         16 . The organic electroluminescent display panel according to  claim 13 , wherein the second organic-layers are formed over the first organic layers.  
     
     
         17 . The organic electroluminescent display panel according to  claim 11  or  12 , wherein the light emitting layers are each deposited at a deposition angle smaller than that of the angle deposition method.  
     
     
         18 . The organic electroluminescent display panel according to  claim 11  or  12 , wherein the second electrodes are deposited at a deposition angle smaller than that of the angle deposition method.  
     
     
         19 . The organic electroluminescent display panel according to  claim 12 , wherein the second organic holes are hole transport layers.  
     
     
         20 . The organic electroluminescent display panel according to  claim 12 , wherein the second organic holes are electron transport layers.  
     
     
         21 . A method of manufacturing an organic electroluminescent display panel having light emitting portions in a plurality of luminous colors formed on a substrate, said method comprising the steps of: 
 forming first electrodes on the substrate;    forming organic layers in associated light emitting areas, the organic layers having different thicknesses for different luminous colors;    forming different light emitting layers for different luminous colors in the associated light emitting areas; and    forming second electrodes.    
     
     
         22 . The method according to  claim 21 , wherein the organic layer forming step includes a step of forming organic layers of equal thicknesses for all the luminous colors at one time and a step of forming organic layers of different thicknesses for different luminous colors.  
     
     
         23 . The method according to  claim 22 , wherein in the organic layer forming step, the step of forming organic layers of different thicknesses for different luminous colors is performed prior to the step of forming organic layers of equal thicknesses for all the luminous colors at one time.  
     
     
         24 . The method according to  claim 21  or  22 , wherein the organic layers are each made of the same organic material.  
     
     
         25 . A method of manufacturing an organic electroluminescent display panel having light emitting portions in a plurality of luminous colors formed on a substrate, said method comprising: 
 forming first electrodes on the substrate;    forming organic layers in associated light emitting areas on the substrate on which the first electrodes were formed, the organic layers having different thicknesses for different luminous colors;    forming different light emitting layers for different luminous colors in the associated light emitting areas after performing the first organic layer forming step; and    forming second electrodes after performing the light emitting layer forming step.    
     
     
         26 . The method according to  claim 25 , wherein the first organic layer forming step includes a step of forming organic layers of equal thicknesses for all the luminous colors at one time and a step of forming organic layers of different thicknesses for different luminous colors.  
     
     
         27 . The method according to  claim 26 , wherein in the first organic layer forming step, the step of forming organic layers of different thicknesses for different luminous colors is performed prior to the step of forming organic layers of equal thicknesses for all the luminous colors at one time.  
     
     
         28 . The method according to  claim 25 , further comprising a second organic layer forming step of forming organic layers of different thicknesses for different luminous colors in the associated light emitting areas after performing the light emitting layer forming step.  
     
     
         29 . The method according to  claim 28 , where in the second organic layer forming step includes a step of forming organic layers of equal thicknesses for all the luminous colors at one time and a step of forming organic layers of different thicknesses for different luminous colors.  
     
     
         30 . The method according to  claim 29 , wherein in the second organic layer forming step, the step of forming organic layers of different thicknesses for different luminous colors is performed prior to the step of forming organic layers of equal thicknesses for all the luminous colors at one time.  
     
     
         31 . The method according to  claim 25 , wherein the first organic layers are a hole transport layer.  
     
     
         32 . The method according to  claim 8 , wherein the second organic layers are an electron transport layer.  
     
     
         33 . An organic electroluminescent display panel having light emitting portions in a plurality of luminous colors formed on a substrate; said display panel comprising: 
 first electrodes formed on the substrate;    first organic layers having different thicknesses for different luminous colors in associated light emitting areas on the substrate on which the first electrodes were formed;    light emitting layers formed on the first organic layers on the light emitting areas corresponding to the different luminous colors; and    second electrodes formed on the light emitting layers.    
     
     
         34 . An organic electroluminescent display panel according to  claim 33 , wherein the first organic layers include organic layers having equal thicknesses for all the luminous colors and organic layers having different thicknesses for different luminous colors.  
     
     
         35 . An organic electroluminescent display panel according to  claim 34 , wherein the first organic layers include organic layers having different thicknesses for different luminescent colors and organic layers formed on the organic layers of different thicknesses and having equal thicknesses for all the luminous colors.  
     
     
         36 . An organic electroluminescent display panel according to  claim 33 , further having second organic layers having different thicknesses for different luminous colors and formed in the associated light emitting areas on the light emitting layers.  
     
     
         37 . The organic electroluminescent display panel according to  claim 36 , wherein the second organic layers include organic layers having equal thicknesses for all the luminous colors and organic layers having different thicknesses for different luminous colors.  
     
     
         38 . The organic electroluminescent display panel according to  claim 37 , wherein the second organic layers include organic layers having different thicknesses for different luminescent colors and organic layers formed on the organic layers of different thicknesses and having equal thicknesses for all the luminous colors.  
     
     
         39 . The organic electroluminescent display panel according to  claim 33 , wherein the first organic layers are a hole transport layer.  
     
     
         40 . An organic electroluminescent display panel according to  claim 36 , wherein the second organic layers are an electron transport layer.