Organic EL display device and method for fabricating the same

Abstract

In one mode of the present invention, there is provided an organic EL display device, which includes an organic light emitting layer provided between sets of electrodes, comprising color filters 22 and an overcoat layer 23 provided on a substrate 21; an inorganic solid layer 24 provided on the overcoat layer 23; a first set of transparent electrodes 25 provided on the inorganic solid layer 24; a light emitting layer 27 provided on the first set of electrodes 25; and a second set of electrodes 28 formed on the light emitting layer 27 ; wherein the inorganic solid layer 24 has routes for moisture passage formed in regions between adjacent electrodes of the first set so as to be uniform over an entire active area.

1 . An organic EL display device, which includes an organic light emitting layer provided between a pair of electrodes, comprising: 
 an organic layer provided on a substrate;    an inorganic solid layer provided on the organic layer;    a first set of transparent electrodes provided on the inorganic solid layer;    an organic light emitting layer provided on the first set of electrodes; and    a second set of electrodes formed on the organic light emitting layer;    wherein the inorganic solid layer has routes for moisture passage formed in regions between adjacent electrodes of the first set so as to be substantially uniform over an entire active area.    
   
   
       2 . An organic EL display device, which includes a plurality of pixels corresponding to an organic light emitting layer provided between sets of electrodes, comprising: 
 an organic layer provided on a substrate;    an inorganic solid layer provided on the organic layer;    a first set of transparent electrodes provided on the inorganic solid layer;    an organic light emitting layer provided on the first set of electrodes; and    a second set of electrodes formed on the organic light emitting layer;    wherein the inorganic solid layer has routes for moisture passage formed in regions between adjacent electrodes of the first set so as to correspond to substantially all pixels.    
   
   
       3 . The organic EL display device according to  claim 2 , wherein the routes for moisture passage are formed at at least one location in each of the regions between adjacent pixels.  
   
   
       4 . An organic EL display device, which includes an organic light emitting layer provided between sets of electrodes, comprising: 
 an organic layer provided on a substrate;    an inorganic solid layer provided on the organic layer;    a first set of transparent electrodes provided on the inorganic solid layer;    an organic light emitting layer provided on the first set of electrodes; and    a second set of electrodes formed on the organic light emitting layer;    wherein the inorganic solid layer has a layer thickness set at such a thickness that allows routes for moisture passage to be formed therein in order to avoid visible failure.    
   
   
       5 . An organic EL display device, which includes an organic light emitting layer provided between sets of electrodes, comprising: 
 an organic layer provided on a substrate;    an inorganic solid layer provided on the organic layer;    a first set of transparent electrodes provided on the inorganic solid layer;    an organic light emitting layer provided on the first set of electrodes; and    a second set of electrodes formed on the organic light emitting layer;    wherein the inorganic solid layer is provided so as to have a layer thickness from 1 to 20 nm in regions between adjacent electrodes of the first set.    
   
   
       6 . The organic EL display device according to  claim 5 , wherein the inorganic solid layer is provided so as to have a layer thickness from 1 to 10 nm in the regions between adjacent electrodes of the first set.  
   
   
       7 . The organic EL display device according to  claim 1 , wherein the inorganic solid layer is provided so as to have a substantially equal thickness in an active area.  
   
   
       8 . The organic EL display device according to  claim 1 , wherein the inorganic solid layer has a greater thickness in regions with the first set of electrodes therein than a thickness in the regions between adjacent electrodes of the first set.  
   
   
       9 . The organic EL display device according to  claim 1 , wherein the inorganic solid layer includes a layer made of silicon oxide.  
   
   
       10 . The organic EL display device according to  claim 9 , wherein the inorganic solid layer includes a layer made of zirconium oxide provided on the layer made of silicon oxide.  
   
   
       11 . A method for fabricating an organic EL display device, comprising: 
 providing an organic layer on a substrate;    providing an inorganic solid layer on the organic layer;    providing a first set of transparent electrodes on the inorganic solid layer;    providing an organic light emitting layer on the first set of electrodes;    providing a second set of electrodes on the organic light emitting layer provided on the first set of electrodes; and    removing water or an organic substance in the organic layer though routes for moisture passage by drying the substrate before providing the organic light emitting layer, the routes for moisture passage being substantially uniformly provided in regions between adjacent electrodes of the first set and in the inorganic solid layer over an entire active area.    
   
   
       12 . A method for fabricating an organic EL display device, which includes a plurality of pixels corresponding to an organic light emitting layer provided between sets of electrodes, comprising: 
 providing an organic layer on a substrate;    providing an inorganic solid layer on the organic layer;    providing a first set of transparent electrodes provided on the inorganic solid layer;    providing an organic light emitting layer on the first set of electrodes;    providing a second set of electrodes formed on the organic light emitting layer provided on the first set of electrodes; and    removing water or an organic substance in the organic layer though routes for moisture passage by drying the substrate before providing the organic light emitting layer, the routes for moisture passage being provided in regions between adjacent electrodes of the first set so as to correspond to substantially all pixels.    
   
   
       13 . A method for fabricating an organic EL display device, comprising: 
 providing an organic layer on a substrate;    providing an inorganic solid layer on the organic layer;    providing a first set of transparent electrodes on the inorganic solid layer;    providing an organic light emitting layer on the first set of electrodes; and    providing a second set of electrodes on the organic light emitting layer provided on the first set of electrodes;    and further comprising:    removing water or an organic substance in the organic layer though routes for moisture passage by drying the substrate before providing the organic light emitting layer, the routes for moisture passage being provided in the inorganic solid layer; and    forming the inorganic solid layer so as to have a layer thickness set at such a thickness that allows the routes for moisture passage to be formed therein in order to avoid visible failure when providing of the organic light emitting layer.    
   
   
       14 . A method for fabricating an organic EL display device, which includes a plurality of pixels corresponding to an organic light emitting layer provided between sets of electrodes, comprising: 
 providing an organic layer on a substrate;    providing an inorganic solid layer on the organic layer;    providing a first set of transparent electrodes provided on the inorganic solid layer;    providing an organic light emitting layer on the first set of electrodes; and    forming the inorganic solid layer so as to have a layer thickness from 1 to 20 nm in regions between adjacent electrodes of the first set when providing of the inorganic solid layer.    
   
   
       15 . The method according to  claim 14 , comprising forming the inorganic solid layer so as to have a layer thickness from 1 to 5 nm when providing of the inorganic solid layer.  
   
   
       16 . The method according to  claim 15 , comprising forming the inorganic solid layer at a substrate temperature of 100° C. or below when providing of the inorganic solid layer.  
   
   
       17 . The method according to  claim 14 , comprising forming the inorganic solid layer at a substrate temperature of 200° C. or above when providing of the inorganic solid layer.  
   
   
       18 . The method according to  claim 11 , further comprising removing at least one part of portions of the inorganic solid layer in the regions between adjacent electrodes of the first set before providing of the organic light emitting layer.