Patent ID: 6395328
Filing Date: 2002-05-28
Classification: H01L,Y10S

Abstract:
A method of fabricating a multi-colour electroluminescent display, comprising the steps of:forming on a substrate a plurality of first electrode regions; forming over a first selected group of said first electrode regions a first layer of a precursor for a first organic polymeric material for emitting radiation of a first colour, said precursor for said first material being susceptible to patterning, at least partially converting said precursor for said first material into said first material, the product of the at least partially converted precursor being substantially resistant to subsequent patterning steps; depositing over said first layer and over at least a second selected group of said first electrode regions a second layer of a precursor for a second organic polymeric material for emitting radiation of a second colour, said precursor for said second material being susceptible to patterning; patterning said second layer to remove said second layer from above said first layer and leaving said second layer over said second selected group of said first electrode regions; at least partially converting said precursor for said second material into said second material; finally converting any partially-converted precursors into said respective materials; forming a plurality of second electrode regions over said layers in such a manner that said materials for emitting radiation can be selectively excited to emit radiation by applying an electric field between said first and second electrode regions.