Patent ID: 7153539

Claim:
A method of producing a light emitting display comprising: providing a substrate; providing a first addressing electrode on the substrate; controllably depositing an electroluminescent organic material that exhibits polymorphism over a first location of the first addressing electrode by delivering a mixture of a compressed fluid solvent and the electroluminescent organic material toward the first location of the first addressing electrode; containing the mixture under a first temperature and/or pressure condition prior to delivery toward the first location of the first addressing electrode by maintaining the mixture under a first temperature and/or pressure process parameter prior to delivery toward the first location of the first addressing electrode; controllably depositing the same electroluminescent organic material over a second location of the first addressing electrode by delivering the mixture of the compressed fluid solvent and the electroluminescent organic material toward the second location of the first addressing electrode, the second location of the first addressing electrode being distinct from the first location of the first addressing electrode; containing the mixture under a second temperature and/or pressure condition prior to delivery toward the second location of the first addressing electrode by maintaining the mixture under a second temperature and/or pressure process parameter prior to delivery toward the second location of the first addressing electrode, the second temperature and/or pressure condition being distinct from the first temperature and/or pressure condition; and providing a second addressing electrode over the electroluminescent organic material in the first and the second location, the electroluminescent organic material associated with the first temperature and/or pressure condition and the second temperature and/or pressure condition becoming free of the compressed fluid solvent prior to reaching the first addressing electrode, the deposited electroluminescent organic material associated with the first temperature and/or pressure condition having a first reflected spectral peak due to the first temperature and/or pressure process parameter, and the deposited electroluminescent organic material associated with the second temperature and/or pressure condition having a second reflected spectral peak due to the second temperature and/or pressure process parameter, the first reflected spectral peak being distinct relative to the second reflected spectral peak.