Deposition of permanent polymer structures for OLED fabrication

Abstract

A light emitting display comprising a first electrode layer on a substrate. The electrode layer is patterned to form a plurality of laterally spaced apart strips in a first direction. A plurality of spacedly disposed light emitting organic elements with a second electrode layer atop are disposed on the first electrode layer in a second direction. An undercut structure made of an undercut pattern transfer layer and an overlaying pattern transfer layer. The undercut structure is disposed between the plurality of spacedly disposed light emitting organic elements. A light emitting display having a color isolation well. The color isolation well is characterized by a first well layer and a second well layer in which the first well layer matches a property of an emissive polymer or small molecule dye held by the well whereas the second well layer does not match the property.

1 . A light emitting display comprising: 
 a transparent substrate;    a first layer of transparent electrically conductive material disposed on the transparent substrate forming a plurality of spaced apart strips having a first direction;    a plurality of spacedly disposed light emitting organic elements with a second layer of electrically conductive material atop, the light emitting organic elements disposed on the first layer of transparent electrically conductive material in a second direction, wherein said first direction intersects said second direction; and    an undercut structure comprised of a first pattern transfer layer and a second pattern transfer layer that is overlayed on said first pattern transfer layer, wherein said first pattern transfer layer is undercut relative to said second pattern transfer layer, the undercut structure between the plurality of spacedly disposed light emitting organic elements.    
     
     
         2 . The light emitting display of  claim 1  wherein said first direction is orthogonal to said second direction.  
     
     
         3 . The light emitting display of  claim 1  wherein said first pattern transfer layer comprises a lift-off resist polyimide.  
     
     
         4 . The light emitting display of  claim 1  wherein said second pattern transfer layer comprises a polymer having a different etch property than an etch property of said first pattern transfer layer.  
     
     
         5 . The light emitting display of  claim 1  wherein said second pattern transfer layer is made from an acrylic type resin, a styrene type resin, a novcflac resin or a polyolefin type resin.  
     
     
         6 . The light emitting display of  claim 1  wherein said light emitting display is a passive matrix OLED-based display.  
     
     
         7 . A light emitting display comprising a color isolation well for holding an emissive polymer or small molecule dye, the color isolation well overlaying a transparent substrate, the color isolation well comprising: 
 a first well layer disposed on the transparent substrates said first well layer forming a first well region; and    a first patterned layer disposed on said first well layer, wherein said first patterned layer is formed from a first precursor.    
     
     
         8 . The light emitting display of  claim 7 , further comprising a second well layer disposed on said first patterned layer, said second well layer forming a second well  20  region that is in fluid communication with said first well region.  
     
     
         9 . The light emitting display of  claim 8  wherein a second patterned layer is disposed on said second well layer and wherein said second patterned layer is formed from a second precursor.  
     
     
         10 . The light emitting display of  claim 8  wherein a composition of said first well layer is determined by a property of said emissive polymer or small molecule dye.  
     
     
         11 . The light emitting display of  claim 10  wherein said property is hydrophobicity and both said emissive polymer or small molecule dye and said lfirst well layer are hydrophobic.  
     
     
         12 . The light emitting display of  claim 10  wherein said property is hydrophobicity and both said emissive polymer or small molecule dye and said first well layer are hydrophilic.  
     
     
         13 . The light emitting display of  claim 8  wherein a composition of said second well layer is determined by a property of said emissive polymer or small molecule dye.  
     
     
         14 . The light emitting display of  claim 13  wherein said property is hydrophobicity and said emissive polymer or small molecule dye is hydrophobic and said second well layer is hydrophilic.  
     
     
         15 . The light emitting display of  claim 13  wherein said property is hydrophobicity and said emissive polymer or small molecule dye is hydrophilic and said second well layer is hydrophobic.  
     
     
         16 . The light emitting display of  claim 7  wherein said first precursor comprises a metal complex comprising at least one ligand selected from the group consisting of acac, carboxylato, alkoxy, azide, carbonyl, nitrato, amine, halide, nitro, and mixtures thereof and at least one metal selected from the group consisting of Li, Al, Si, Ti, V, Cr, Mn, Fe, Ni, Co, Cu, Zn, Sr, Y, Zr, Nb, Mo, Ru, Rh, Pd, Ag, In, Sn, Ba, La, Pr, Sm, Eu, Hf, Ta, W, Re, Os, Ir, Pt, Au, Pb, Th, U, Sb, As, Ce, Mg, and mixtures thereof.  
     
     
         17 . The light emitting display of  claim 9  wherein said second patterned comprises a metal complex comprising at least one ligand selected from the group consisting of acac, carboxylato, alkoxy, azide, carbonyl, nitrato, amine, halide, nitro, and mixtures thereof and at least one metal selected from the group consisting of Li, Al, Si, Ti, V, Cr, Mn, Fe, Ni, Co, Cu, Zn, Sr, Y, Zr, Nb, Mo, Ru, Rh, Pd, Ag, In, Sn, Ba, La, Pr, Sm, Eu, Hf, Ta, W, Re, Os, Ir, Pt, Au, Pb, Th, U, Sb, As, Ce, Mg, and mixtures thereof.  
     
     
         18 . The light emitting display of  claim 1  wherein said undercut structure has a length that is between 100 nm and 500 microns and a width that is between 100 nm microns and 400 microns.  
     
     
         19 . The light emitting display of  claim 1  wherein said undercut structure has a length that is between 25 microns and 35 microns and a width that is between 15 microns and 25 microns.  
     
     
         20 . The light emitting display of  claim 1  wherein said undercut structure has a thickness between 0.75 microns and 4.5 microns.  
     
     
         21 . The light emitting display of  claim 1  wherein said undercut structure has a thickness between 2 microns and 3 microns.  
     
     
         22 . The light emitting display of  claim 7  wherein said color isolation well has a 25 thickness of between 0.25 microns and five microns.  
     
     
         23 . The light emitting display of  claim 7  wherein said color isolation well has a thickness of between 0.5 microns and 1.5 microns.  
     
     
         24 . The light emitting display of  claim 7  wherein said color isolation well has a length between 75 microns and 500 microns and a width between 75 microns and 400 microns.  
     
     
         25 . The light emitting display of  claim 7  wherein said color isolation well has a length between 100 microns and 350 microns and a width between 80 microns and 150 microns.  
     
     
         26 . The light emitting display of  claim 7  wherein said second well region has a larger width and a larger length than said first well region.  
     
     
         27 . The light emitting display of  claim 1  wherein said first pattern transfer layer is made using a polymer that (i) does not dissolve said second pattern transfer layer and (ii) results in said first pattern layer having an etch rate that is faster than the etch rate of said second pattern layer.  
     
     
         28 . The light emitting display of  claim 27  wherein an etch rate of said first pattern transfer layer is 100 times faster than an etch rate of said second pattern transfer  15  layer.  
     
     
         29 . The light emitting display of  claim 8  wherein said light emitting display comprises a passive matrix or active matrix OLED-based display.