Patent ID: 8198638

Claim:
A method of fabricating an electroluminescent light emitting device comprising: providing a substrate; providing an emitter layer structure comprising at least one active layer containing luminescent centres for emitting light of a characteristic wavelength; providing field dielectric regions defining a device well of the emitter layer structure; providing electrodes for applying an electric field to the emitter layer structure within the device well region, for excitation of light emission, one of said electrodes extending from the device well over a field dielectric region adjacent the device well, and providing an electrical contact to said electrode over the field oxide region; wherein the step of providing the field dielectric regions comprises depositing a field dielectric layer over the emitter layer structure, and patterning the field dielectric layer to form the field dielectric regions defining the device well region of the emitter layer structure; and wherein the step of providing the emitter layer structure comprises depositing a layer stack comprising at least one layer pair comprising an active layer and a respective drift layer adjacent the active laver, wherein each active layer comprises luminescent centres in a host matrix material, and each respective drift layer comprises a dielectric or wide bandgap semiconductor.