Organic electroluminescenst display panel and manufacturing method therefor

Abstract

An organic electroluminescent display panel includes: one or more organic electroluminescent elements each having first and second display electrodes and one or more organic functional layers of organic compounds sandwiched and layered between the first and second display electrodes, the organic functional layers including a light-emitting layer; and a substrate supporting the organic electroluminescent elements. The display panel also includes: a first inorganic barrier film covering the organic electroluminescent elements and a surface of the substrate around the one or more organic electroluminescent elements; a first high-molecular compound film having an area larger than each of the organic electroluminescent elements so as to partially cover the first inorganic barrier film thereover; and a second inorganic barrier film covering the first high-molecular compound film and an edge thereof.

1 . A method of manufacturing an organic electroluminescent display panel comprising one or more organic electroluminescent elements and a substrate supporting the organic electroluminescent elements, comprising the steps of: 
 forming one or more organic electroluminescent elements on a substrate, each having first and second display electrodes and one or more organic functional layers of organic compounds sandwiched and layered between said first and second display electrodes, the organic functional layers including a light-emitting layer;    forming a first inorganic barrier film having an area larger than each of said organic electroluminescent elements so as to cover said organic electroluminescent elements;    forming a first high-molecular compound film having an area larger than each of said organic electroluminescent elements so as to partially cover said first inorganic barrier film thereover; and    forming a second inorganic barrier film covering said first high-molecular compound film and an edge thereof.    
   
   
       2 . A method according to  claim 1 , wherein said first high-molecular compound film is formed to have an area smaller than that of said first inorganic barrier film and larger than each of said organic electroluminescent elements.  
   
   
       3 . A method according to  claim 1 , wherein said first high-molecular compound film is formed to cover said first inorganic barrier film, an edge thereof, and a surface of the substrate around said first inorganic barrier film.  
   
   
       4 . A method according to  claim 1 , further comprising a second high-molecular compound film having an area larger than each of said organic electroluminescent elements so as to partially cover said second inorganic barrier film thereover; and a third inorganic barrier film covering said second high-molecular compound and an edge thereof.  
   
   
       5 . A method according to  claim 1 , wherein said inorganic barrier film is made of silicon nitride or silicon oxynitride.  
   
   
       6 . A method according to  claim 1 , wherein said inorganic barrier film is formed by a plasma chemical vapor deposition process or a sputter deposition process or a catalytic chemical vapor deposition.  
   
   
       7 . A method according to  claim 1 , wherein said high-molecular compound film is formed by a plasma polymerization deposition process or a chemical vapor deposition process or a vapor deposition polymerization.