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US 6,784,009 B2Granted
Electrode patterning in OLED devices
AssigneeOsram Opto Semiconductors (Malaysia) Sdn. Bhd
InventorsHooi Bin Lim, Hagen Klausmann, Bernd Fritz
Life of this patent
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Abstract
An OLED device having pillars with cross section that is wider on the top. The pillars structure a conductive layer during deposition into distinct portions located between the pillars and on the top of the pillars. In one embodiment, the grooves between the pillars extend outside the electrode region to prevent shorting of adjacent electrodes.
Claims27
A method for forming an OLED device comprising:
- forming a device layer on a substrate having an active region defined thereon in which pixels are formed;
- patterning the device layer to form pillars along a first direction on the substrate, wherein the pillars comprise a tapered profile, and grooves between the pillars, the pillars extend outside the active region to prevent electrical shorting;
- coating the substrate with a solution comprising an organic functional material dissolved in a solvent, the pillars are inert to the solvent;
- removing to solvent to form an organic functional layer;
- and
- depositing a conductive layer in the electrode region on the substrate, wherein the tapered profile of the pillars separate the conductive layer into first and second distinct portions.
3 more elements
A method for forming an OLED device comprising:
- forming a device layer on a substrate having an active region defined thereon in which pixels are formed;
- patterning the device layer to form pillars along a first direction on the substrate, wherein the pillars comprise a tapered profile, and grooves between the pillars, the pillars extend outside the active region to edges of the substrate to prevent electrical shorting;
- coating the substrate with a solution comprising an organic functional material dissolved in a solvent, the pillars are inert to the solvent;
- removing the solvent to form an organic functional layer;
- and
- depositing a conductive layer on the substrate, wherein the tapered profile of the pillars separate the conductive layer into first and second distinct portions.
3 more elements
A method for forming an OLED device comprising:
- forming a device layer on a substrate having an active region defined thereon in which pixels are formed;
- patterning the device layer to form pillars along a first direction on the substrate, wherein the pillars comprise a tapered profile and grooves between the pillars, the pillars extend outside the active region to prevent electrical shorting;
- forming an organic functional material on the substrate;
- and
- depositing a conductive layer in the electrode region on the substrate, wherein the tapered profile of the pillars separate the conductive layer into first and second distinct portions.
2 more elements
Dependencies are inferred from the claim text.