Patent ID: 8039040
Filing Date: 2011-10-18
Classification: B41F,B41M,B41N,C09D,H01L,H05B

Abstract:
1. A method for the formation of a luminescent layer in an organic electroluminescent device comprising opposed electrodes, a luminescent element layer provided between the electrodes, the luminescent element layer comprising at least a luminescent layer, the method comprising the steps of: filling an ink, for a luminescent layer, comprising at least an organic luminescent material into cells in a gravure form; allowing a blanket to receive the ink for a luminescent layer from the cells; and then transferring the ink for a luminescent layer on the blanket onto a luminescent layer forming face, wherein the blanket has a resin film having a surface tension of not less than 35 dynes/cm as a surface layer, the ink for a luminescent layer has a viscosity (ink temperature 23° C.) in the range of 5 to 200 cP as measured at a shear rate of 100/sec, and a solvent having a surface tension of not more than 40 dynes/cm and a boiling temperature in the range of 150 to 250° C. is used in the ink for a luminescent layer.