Current-driven light-emitting display apparatus and method of producing the same

Abstract

A method for producing an organic EL display device is disclosed. The display device comprises a substrate, a transistor disposed on the substrate, a flattened inter-layer insulation film covering the transistor, a pixel electrode, and an organic EL layer.

What is claimed is:  
     
         1 . A method for producing a display, the steps comprising: 
 forming a transistor on a substrate;    forming and flattening an inter-layer insulation film over the transistor, forming a contact hole in the inter-layer insulation film;    forming a pixel electrode on the inter-layer insulation film; and    forming an organic EL layer in a pixel region corresponding to the pixel electrode, the transistor being connected to the pixel electrode through the contact hole.    
     
     
         2 . A method for producing a display, the steps comprising: 
 forming a transistor on a substrate;    forming a first inter-layer insulation film over the transistor;    forming and flattening a second inter-layer insulation film over the first inter-layer insulation film;    forming a pixel electrode on the flattened second inter-layer insulation film;    forming an organic EL layer in a pixel region corresponding to the pixel electrode; and    forming a contact hole in the first inter-layer insulation film and the second inter-layer insulation film, the transistor being connected to the pixel electrode through the contact hole.    
     
     
         3 . A method for producing a display, the steps comprising: 
 forming a transistor on a substrate;    forming a first inter-layer insulation film over the transistor;    forming a first contact hole in the first inter-layer insulation film, the transistor being connected to an electrode layer through the first contact hole;    forming and flattening a second inter-layer insulation film over the first inter-layer insulation film and the electrode layer;    forming a pixel electrode on the second inter-layer insulation film after the flattening process of the second inter-layer insulation film;    forming an organic EL layer in a pixel region corresponding to the pixel electrode; and    forming a second contact hole in the second inter-layer insulation film, the transistor being connected to the pixel electrode through the second contact hole.    
     
     
         4 . The method according to  claim 1 , further comprising forming a bank layer for defining the pixel region.  
     
     
         5 . The method according to  claim 1 , the forming of the organic EL layer being performed by an ink-jet method.  
     
     
         6 . A display, comprising: 
 a substrate;    a transistor disposed on the substrate;    a flattened inter-layer insulation film covering the transistor;    a pixel electrode formed on the flattened inter-layer insulation film; and    an organic EL layer disposed between the pixel electrode and a counter electrode.    
     
     
         7 . The display according to  claim 6 , further comprising a contact hole, the transistor being connected to the pixel electrode through the contact hole.  
     
     
         8 . The display according to  claim 6 , the organic EL layer being surrounded by a bank layer.  
     
     
         9 . The display according to  claim 8 , the bank layer being formed on the inter-layer insulation film.