Patent ID: 7396637

Claim:
A method for manufacturing an electroluminescent element by photolithography, comprising: a process of forming a buffer layer, a light-emitting portion of at least one color, and a photoresist layer on a substrate in this order starting from the substrate side; a process of forming the buffer layer by coating a buffer layer forming coating solution; a process of forming a heterochromatic light-emitting layer by coating the buffer layer with a heterochromatic light-emitting layer forming coating solution which expresses a different color from the color of the above light-emitting portion; a process of forming a photoresist layer for the heterochromatic light-emitting layer by coating the heterochromatic light-emitting layer with a photoresist; a process of pattern-exposing and developing the photoresist layer for the heterochromatic light-emitting layer, such that only a portion of the photoresist layer for the heterochromatic light-emitting layer which the heterochromatic light-emitting portion is to be formed, is remained; and a process of forming the heterochromatic light-emitting portion, having the photoresist layer for the heterochromatic light-emitting layer on the surface thereof, in a pattern by removing portions of the buffer layer and the heterochromatic light-emitting layer which the photoresist layer for the heterochromatic light-emitting layer is removed, wherein the photoresist layer for the heterochromatic light-emitting layer is insoluble to a buffer layer solvent of the buffer layer forming coating solution.