Patent ID: 11925058
Assignee: AVALON HOLOGRAPHICS INC.
Field: Optics (Instruments)
Classification: CPC H | IPC H

Claim 16:
17. A method for fabrication of a multi-colored microcavity organic light emitting diode array, the method comprising:
patterning a bottom first series of electrodes on a substrate;
depositing a first filler layer selected for a first color on top of a first group of electrodes in the bottom first series of electrodes;
depositing a second filler layer selected for a second color on top of a second group of electrodes in the bottom first series of electrodes;
depositing an intermediate series of electrodes on the first filler layer and the second filler layer, each electrode in the intermediate series of electrodes comprising an overhang region electrically connecting each intermediate electrode to a corresponding electrode in the bottom first series of electrodes;
blanket depositing a white organic light emitting stack on the intermediate series of electrodes; and
blanket depositing a top series of electrodes on the white organic light emitting stack; and
depositing a distributed Bragg reflector (DBR) on top of the top series of electrodes, the DBR comprising alternate layers of dielectric materials, the DBR forming an optical microcavity with a resonance wavelength between the intermediate series of electrodes and the DBR, the DBR having a high reflectivity with dielectric layer thicknesses chosen such that the optical path length of each layer in the DBR is one quarter of the resonance wavelength of the optical microcavity.