Patent ID: 6582888
Filing Date: 2003-06-24
Classification: H01L

Abstract:
A method of fabricating organic electroluminescent components, which comprises:providing a substrate having a bottom electrode formed on a surface of the substrate; depositing a first photosensitive layer on the substrate over the bottom electrode; depositing a second photosensitive layer on the first photosensitive layer, the first photosensitive layer having a higher development rate in a developer than the second photosensitive layer, and the second photosensitive layer not damaging the first photosensitive layer; maintaining a boundary between the first photosensitive layer and the second photosensitive layer; selectively exposing the second photosensitive layer with an exposure source; developing the first and second photosensitive layers to form structures of which a width of the first photosensitive layer is less than a width of the second photosensitive layer to form an overhang in the structures as a result of the higher development rate of the first photosensitive layer in the developer; forming at least one organic electroluminescent layer in areas between the structures; depositing a top electrode over the substrate, the top electrode being defined into distinct first and second portions by the overhang, the first portions being formed in areas between the structures to serve as top electrodes, and the second portions being formed over the structures; selecting a composition of the first photosensitive layer that is soluble in a first solvent; and selecting a composition of the second photosensitive layer that is soluble in a second solvent, the first solvent not dissolving the composition of the second photosensitive layer and the second solvent not dissolving the composition of the first photosensitive.