Method for producing organic electroluminescent components

A method of fabricating organic electroluminescent components, which comprises:

• providing a transparent substrate having a transparent conductive bottom electrode formed on a surface of the substrate, the bottom electrode having bottom conductive rails in a first direction;
• depositing a first photosensitive layer on the substrate over the bottom electrode;
• depositing a second photosensitive layer on the first photosensitive layer, the second photosensitive layer not damaging the first photosensitive layer, the first photosensitive layer developing faster in a developer than the second photosensitive layer, and the first photosensitive layer being a positive photosensitive layer;
• maintaining a boundary between the first and second photosensitive layers;
• 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 having first and second portions, the first portions being formed in areas between the structures to serve as top electrodes and the second portions being formed over the structures, the first portions being configured into top conductive rails that traverse the bottom conductive rails;
• 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.

A method of fabricating organic electroluminescent components, which comprises:

• providing a transparent substrate having a transparent conductive bottom electrode formed on a surface of the substrate, the bottom electrode having bottom conductive rails in a first direction;
• 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 developing faster in a developer than the second photosensitive layer, the second photosensitive layer being chosen from the group of photosensitive layers consisting of a positive photosensitive layer and a negative photosensitive layer, and the second photosensitive layer not damaging the first photosensitive layer;
• maintaining a boundary remaining between the first and second photosensitive layers;
• 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 undercut 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 forming distinct first and second portions, the first portions being formed in areas between the structures to serve as top electrodes and the second portions being formed over the structures, the first portions being configured into top conductive rails that traverse the bottom conductive rails;
• 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.

A method of fabricating organic electroluminescent components comprising:

• 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 being a negative photosensitive layer and 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;
• and
• 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.