Patent ID: 9252397
Filing Date: 2016-02-02
CPC Classification: B05B,C23C,H01L

Claim Text:
1. A device comprising: a first nozzle configured to eject a first mixture over a first region of a substrate, the first mixture comprising a host and an organic dopant; and a second nozzle configured to eject a second mixture over the first region of the substrate, the second mixture comprising the host and the organic dopant; wherein the device is configured to create the first and second mixtures, with the first mixture comprising a different ratio of host to organic dopant than the second mixture, and wherein the first and second nozzles deposit graded organic layers from the first and second mixtures, where each layer is deposited by a different nozzle and each layer contains substantially the same amount of total host and dopant material, but the ratios and components of the organic material vary from one layer to another.