US 7,547,462 B2 · Method of fabricating organic light emitting display device

Abstract

The present invention relates to a flat panel display, and more particularly, to a method of fabricating an organic light emitting display device so as to improve device characteristics by patterning a plurality of organic layers using a heat transfer method to optimize thicknesses according to R, G and B pixels. The method includes: forming lower electrodes of R, G and B pixels on an insulating substrate; forming an organic layer on the insulating substrate; and forming an upper electrode on the organic layer. Formation of the organic layer includes forming a hole injection layer and a hole transport layer of the R, G and B pixels on the entire surface of the substrate as a common layer. The R and G emission layers are patterned by a heat transfer method using a heat transfer device having a transfer layer such that an organic layer is patterned to a thickness obtained by subtracting a thickness of the B emission layer from the thicknesses of the R and G emission layers required in R and G colors.

Claims10

Dependent claims

A method of fabricating an organic light emitting display device, comprising the steps of:

forming lower electrodes of R, G and B pixels on a substrate;
forming an organic layer on the substrate;
and
forming an upper electrode on the organic layer;
wherein the step of forming the organic layer comprises:
forming hole injection layers and hole transport layers of the R, G and B pixels on an entire surface of the substrate as a common layer;
forming R and G emission layers on the hole transport layers of the R and C pixels, respectively;
and
forming a B emission layer as a common layer on an entire surface of the substrate which includes the R and G emission layers;
wherein the R and G emission layers are formed by patterning through a heat transfer method using a heat transfer device having a transfer layer so that the R and G emission layers are patterned to a thickness obtained by subtracting the thickness of the B emission common layer from optically optimized thicknesses of an R emission layer and a G emission layer required in R and G colors in a case where the B emission layer is patterned and not common.

7 more elements

A method of fabricating an organic light emitting display device, comprising the steps of:

forming lower electrodes of R, G and B pixels on a substrate;
forming an organic layer on the substrate;
and
forming an upper electrode on the organic layer;
wherein the step of forming the organic layer comprises forming hole injection layers of the R, G and B pixels on an entire surface of the substrate, patterning hole transport layers of the R and G pixels, patterning emission layers of the R and G pixels, and forming an emission layer of the B pixel as a common layer over the entire surface of the substrate which includes the emission layers of the R and G pixels;
an
wherein the hole transport layers and the emission layers of the R and G pixels are simultaneously formed by a heat transfer method using a heat transfer device having an organic layer as a transfer layer in which the hole transport layers and the emission layers are respectively patterned, and wherein thicknesses of the hole transport layers of the R and G pixels respectively are equal to a difference between a sum of optically optimized thicknesses of the hole injection layer and the hole transport layers of the R and G pixels respectively when the hole transport layer and the hole injection layer are formed as a common layer and a thickness of the hole injection layer of the B pixel.

4 more elements

Dependencies are inferred from the claim text.

Method of fabricating organic light emitting display device

Life of this patent

Method of fabricating organic light emitting display device

Life of this patent

Abstract

Claims10