Patent ID: 8124185

Claim:
A method for manufacturing an organic functional layer, comprising the steps of: forming a coated film of an organic functional material by applying a coating liquid to a substrate by a printing method, the coating liquid including an organic functional material dissolved or dispersed in a first organic solvent; bringing the coated film into contact with vapor or liquid of a second organic solvent, and removing the first organic solvent inside the coated film, the second organic solvent having the following properties: (1) chemically non-active; (2) the second organic solvent can be mixed with the first solvent; (3) the second organic solvent can not substantially dissolve the organic functional material; and (4) a vapor pressure of the second organic solvent is higher than that of the first organic solvent at a room temperature, wherein the step of forming the coating film includes a relief printing type offset printing method or an ink-jet printing method, wherein the first organic solvent is a mixed solvent of 50% toluene and 50 para diethylbenzene, and wherein the second organic solvent is ethyl nona fluorobutyl ether.