Patent ID: 8329059

Claim:
A method of producing an ink for forming a functional layer that is contained in an organic electroluminescent device, the method comprising: dehydrating a first solvent and a second solvent by placing molecular sieves functioning as a water absorbent in order to remove water content in the first solvent and the second solvent, both the first solvent and the second solvent having a boiling point of 150° C. or more; deoxygenating the first solvent and the second solvent by bubbling of N2 gas in order to remove water content and oxygen content in the first solvent and the second solvent after dehydrating the first solvent and the second solvent, each of the water content and the oxygen content in the first and the second solvents being 20 ppm or less after the dehydration and the deoxygenation; mixing the first solvent and the second solvent to produce a mixed solvent after dehydrating and deoxygenating the first solvent and the second solvent individually; and producing an ink by mixing the mixed solvent and a functional material.